1 Samuel 7:3

And Samuel spoke unto all the house of Israel, saying, If you do return unto the LORD with all your hearts, then put away the foreign gods and Ashtaroth from among you, and prepare your hearts unto the LORD, and serve him only: and he will deliver you out of the hand of the Philistines.

Joshua 24:14

Now therefore fear the LORD, and serve him in sincerity and in truth: and put away the gods which your fathers served on the other side of the River, and in Egypt; and serve you the LORD.

Genesis 35:2

Then Jacob said unto his household, and to all that were with him, Put away the foreign gods that are among you, and be clean, and change your garments:

Deuteronomy 6:13

You shall fear the LORD your God, and serve him, and shall swear by his name.

Deuteronomy 13:4

You shall walk after the LORD your God, and fear him, and keep his commandments, and obey his voice, and you shall serve him, and cleave unto him.

Judges 2:13

And they forsook the LORD, and served Baal and Ashtaroth.

Isaiah 55:7

Let the wicked forsake his way, and the unrighteous man his thoughts: and let him return unto the LORD, and he will have mercy upon him; and to our God, for he will abundantly pardon.

Matthew 4:10

Then said Jesus unto him, Begone, Satan: for it is written, You shall worship the Lord your God, and him only shall you serve.

Luke 4:8

And Jesus answered and said unto him, Get you behind me, Satan: for it is written, You shall worship the Lord your God, and him only shall you serve.

Deuteronomy 10:20

You shall fear the LORD your God; him shall you serve, and to him shall you cleave, and swear by his name.

Joshua 24:23

Now therefore put away, said he, the foreign gods which are among you, and incline your heart unto the LORD God of Israel.

1 Kings 8:48

And so return unto you with all their heart, and with all their soul, in the land of their enemies, which led them away captive, and pray unto you toward their land, which you gave unto their fathers, the city which you have chosen, and the house which I have built for your name:

Deuteronomy 30:2-10

And shall return unto the LORD your God, and shall obey his voice according to all that I command you this day, you and your children, with all your heart, and with all your soul;

2 Chronicles 30:19

That prepares his heart to seek God, the LORD God of his fathers, though he is not cleansed according to the purification of the sanctuary.

Joel 2:12-13

Therefore also now, says the LORD, turn you even to me with all your heart, and with fasting, and with weeping, and with mourning:

Judges 10:6

And the children of Israel did evil again in the sight of the LORD, and served Baalim, and Ashtaroth, and the gods of Syria, and the gods of Zidon, and the gods of Moab, and the gods of the children of Ammon, and the gods of the Philistines, and forsook the LORD, and served not him.

Judges 10:16

And they put away the foreign gods from among them, and served the LORD: and his soul was grieved for the misery of Israel.

1 Samuel 31:10

And they put his armor in the house of Ashtaroth: and they fastened his body to the wall of Bethshan.

1 Chronicles 22:19

Now set your heart and your soul to seek the LORD your God; arise therefore, and build you the sanctuary of the LORD God, to bring the ark of the covenant of the LORD, and the holy vessels of God, into the house that is to be built to the name of the LORD.

1 Chronicles 28:9

And you, Solomon my son, know you the God of your father, and serve him with a perfect heart and with a willing mind: for the LORD searches all hearts, and understands all the imaginations of the thoughts: if you seek him, he will be found of you; but if you forsake him, he will cast you off forever.

2 Chronicles 19:3

Nevertheless there are good things found in you, in that you have taken away the idol poles out of the land, and have prepared your heart to seek God.

Job 11:13-14

If you prepare your heart, and stretch out your hands toward him;

Proverbs 16:1

The preparations of the heart belong to man, but the answer of the tongue, is from the LORD.

Jeremiah 4:3-4

For thus says the LORD to the men of Judah and Jerusalem, Break up your fallow ground, and sow not among thorns.

Ezekiel 18:31

Cast away from you all your transgressions, by which you have transgressed; and make you a new heart and a new spirit: for why will you die, O house of Israel?

Hosea 6:1-2

Come, and let us return unto the LORD: for he has torn, and he will heal us; he has smitten, and he will bind us up.

Hosea 14:1

O Israel, return unto the LORD your God; for you have fallen because of your iniquity.

Matthew 6:24

No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. You cannot serve God and mammon.

Matthew 15:8

These people draw near unto me with their mouth, and honor me with their lips; but their heart is far from me.

John 4:24

God is a Spirit: and they that worship him must worship him in spirit and in truth.

Treasury of Scripture Knowledge

Summary

And Samuel spake unto all the house of Israel, saying, If ye do return unto the LORD with all your hearts, then put away the strange gods and Ashtaroth from among you, and prepare your hearts unto the LORD, and serve him only: and he will deliver you out of the hand of the Philistines.

General references

Bible References

Return

Deuteronomy 30:2
And shall return unto the LORD your God, and shall obey his voice according to all that I command you this day, you and your children, with all your heart, and with all your soul;
1 Kings 8:48
And so return unto you with all their heart, and with all their soul, in the land of their enemies, which led them away captive, and pray unto you toward their land, which you gave unto their fathers, the city which you have chosen, and the house which I have built for your name:
Isaiah 55:7
Let the wicked forsake his way, and the unrighteous man his thoughts: and let him return unto the LORD, and he will have mercy upon him; and to our God, for he will abundantly pardon.
Hosea 6:1
Come, and let us return unto the LORD: for he has torn, and he will heal us; he has smitten, and he will bind us up.
Hosea 14:1
O Israel, return unto the LORD your God; for you have fallen because of your iniquity.
Joel 2:12
Therefore also now, says the LORD, turn you even to me with all your heart, and with fasting, and with weeping, and with mourning:

Prepare

Deuteronomy 30:6
And the LORD your God will circumcise your heart, and the heart of your descendants, to love the LORD your God with all your heart, and with all your soul, that you may live.
1 Chronicles 22:19
Now set your heart and your soul to seek the LORD your God; arise therefore, and build you the sanctuary of the LORD God, to bring the ark of the covenant of the LORD, and the holy vessels of God, into the house that is to be built to the name of the LORD.
1 Chronicles 28:9
And you, Solomon my son, know you the God of your father, and serve him with a perfect heart and with a willing mind: for the LORD searches all hearts, and understands all the imaginations of the thoughts: if you seek him, he will be found of you; but if you forsake him, he will cast you off forever.
2 Chronicles 30:19
That prepares his heart to seek God, the LORD God of his fathers, though he is not cleansed according to the purification of the sanctuary.
Job 11:13
If you prepare your heart, and stretch out your hands toward him;
Proverbs 16:1
The preparations of the heart belong to man, but the answer of the tongue, is from the LORD.
Jeremiah 4:3
For thus says the LORD to the men of Judah and Jerusalem, Break up your fallow ground, and sow not among thorns.
Ezekiel 18:31
Cast away from you all your transgressions, by which you have transgressed; and make you a new heart and a new spirit: for why will you die, O house of Israel?
Matthew 15:8
These people draw near unto me with their mouth, and honor me with their lips; but their heart is far from me.
John 4:24
God is a Spirit: and they that worship him must worship him in spirit and in truth.

Serve him

Deuteronomy 6:13
You shall fear the LORD your God, and serve him, and shall swear by his name.
Deuteronomy 10:20
You shall fear the LORD your God; him shall you serve, and to him shall you cleave, and swear by his name.
Deuteronomy 13:4
You shall walk after the LORD your God, and fear him, and keep his commandments, and obey his voice, and you shall serve him, and cleave unto him.
Matthew 4:10
Then said Jesus unto him, Begone, Satan: for it is written, You shall worship the Lord your God, and him only shall you serve.
Matthew 6:24
No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. You cannot serve God and mammon.
Luke 4:8
And Jesus answered and said unto him, Get you behind me, Satan: for it is written, You shall worship the Lord your God, and him only shall you serve.

General references

Ecclesiastes 9:17
The words of wise men are heard in quiet more than the cry of him that rules among fools.