1 Samuel 7:3
And Samuel spoke unto all the house of Israel, saying, If ye 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.
Joshua 24:14
Now therefore fear the LORD and serve him in perfection and in truth and put away from among you the gods which your fathers served on the other side of the river and in Egypt, and serve ye the LORD.
Genesis 35:2
Then Jacob said unto his household and to all that were with him, Put away the strange gods that are among you and be clean and change your garments:
Deuteronomy 6:13
Thou shalt fear the LORD thy God and serve him and shalt swear by his name.
Deuteronomy 13:4
Ye shall walk after the LORD your God and fear him and keep his commandments and hear his voice, and ye 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 Jesus said unto him, Get thee hence, Satan, for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.
Luke 4:8
And Jesus answered and said unto him, Get thee behind me, Satan; for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.
Deuteronomy 10:20
Thou shalt fear the LORD thy God; him shalt thou serve, and to him shalt thou cleave and swear by his name.
Joshua 24:23
Now, therefore, take away, the strange gods which are among you and incline your heart unto the LORD God of Israel.
1 Kings 8:48
and so convert themselves unto thee with all their heart and with all their soul in the land of their enemies, who led them away captive and pray unto thee toward their land, which thou didst give unto their fathers, toward the city which thou hast chosen and the house which I have built for thy name,
Deuteronomy 30:2-10
and shalt convert unto the LORD thy God and shalt hear his voice according to all that I command thee this day, thou and thy children, with all thine heart and with all thy soul,
2 Chronicles 30:19
that has prepared his heart to seek God, the LORD God of his fathers, even though he is not cleansed according to the purification of the sanctuary.
Joel 2:12-13
Therefore also now, saith the LORD, turn unto me with all your heart and with fasting and with weeping, and with mourning:
Judges 10:6
And the sons of Israel did evil again in the sight of the LORD and served the Baalim and Ashtaroth and the gods of Syria and the gods of Zidon and the gods of Moab and the gods of the sons of Ammon and the gods of the Philistines and forsook the LORD and did not serve him.
Judges 10:16
And they put away the strange 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 weapons 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 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 unto the name of the LORD.
1 Chronicles 28:9
And thou, Solomon, my son, know thou the God of thy father and serve him with a perfect heart and with a willing soul, for the LORD searches all hearts and understands all the imaginations of the thoughts. If thou seek him, he will be found of thee; but if thou forsake him, he will cast thee off for ever.
2 Chronicles 19:3
Nevertheless, good things have been found in thee, in that thou hast burned down the groves of the land and hast prepared thy heart to seek God.
Job 11:13-14
If thou would prepare thine heart and stretch out thine hands toward him;
Proverbs 16:1
Of man are the preparations of the heart, but the answer of the tongue is from the LORD.
Jeremiah 4:3-4
For thus has the LORD said to every man of Judah and of Jerusalem, Break up your fallow ground, and do not sow among thorns.
Ezekiel 18:31
Cast away from you all your iniquities by which ye have rebelled, and make yourselves a new heart and a new spirit; for why will ye 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, become converted unto the LORD thy God; for thou hast fallen by thine iniquity.
Matthew 6:24
No one 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. Ye cannot serve God and riches.
Matthew 15:8
This people draws nigh unto me with their mouth and honours me with their lips, but their heart is far from me.
John 4:24
God is a Spirit and those that worship him must worship him in spirit and in truth.