Deuteronomy 11:13

If thou shalt hearken therefore unto my commandments which I command you this day, that ye love the LORD your God and serve him with all your hearts and with all your souls;

Deuteronomy 4:29

Neverthelater, ye shall seek the LORD your God even there, and shalt find him if thou seek him with all thine heart and with all thy soul.

Deuteronomy 6:17

But see that ye keep the commandments of the LORD your God, his witnesses and his ordinances which he hath commanded thee,

Deuteronomy 10:12

And now, Israel, what is it that the LORD thy God requireth of thee, but to fear the LORD thy God and to walk in all his ways and to love him and to serve the LORD thy God with all thine heart and with all thy soul,

Deuteronomy 6:5-6

And thou shalt love the LORD thy God with all thine heart, with all thy soul and with all thy might.

Deuteronomy 11:8

Keep, therefore, all the commandments which I command thee this day that ye may be strong and go and conquer the land whither ye go to possess it,

Deuteronomy 11:22

For if ye shall keep all these commandments which I command you, so that ye do them and love the LORD your God and walk in all his ways and cleave unto him;

Psalm 119:4

Thou hast given straight charge to keep thy commandments:

Treasury of Scripture Knowledge

Summary

And it shall come to pass, if ye shall hearken diligently unto my commandments which I command you this day, to love the LORD your God, and to serve him with all your heart and with all your soul,

Bible References

Diligently

Deuteronomy 11:8
Keep, therefore, all the commandments which I command thee this day that ye may be strong and go and conquer the land whither ye go to possess it,
Deuteronomy 6:17
But see that ye keep the commandments of the LORD your God, his witnesses and his ordinances which he hath commanded thee,
Psalm 119:4
Thou hast given straight charge to keep thy commandments:

General references

Leviticus 26:3
"'If ye shall walk in mine ordinances and keep my commandments and do them,
Deuteronomy 6:17
But see that ye keep the commandments of the LORD your God, his witnesses and his ordinances which he hath commanded thee,
Deuteronomy 15:5
so that thou hearken unto the voice of the LORD thy God, to observe and do all these commandments which I command you this day.
Psalm 119:4
Thou hast given straight charge to keep thy commandments: