Deuteronomy 15:5

Only if you carefully hearken unto the voice of the LORD your God, to observe to do all these commandments which I command you this day.

Leviticus 26:3-14

If you walk in my statutes, and keep my commandments, and do them;

Deuteronomy 4:9

Only take heed to yourself, and keep your soul diligently, lest you forget the things which your eyes have seen, and lest they depart from your heart all the days of your life: but teach them to your sons, and your sons' sons;

Deuteronomy 11:13-15

And it shall come to pass, if you 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,

Deuteronomy 28:1-15

And it shall come to pass, if you shall hearken diligently unto the voice of the LORD your God, to observe and to do all his commandments which I command you this day, that the LORD your God will set you on high above all nations of the earth:

Joshua 1:7

Only be strong and very courageous, that you may observe to do according to all the law, which Moses my servant commanded you: turn not from it to the right hand or to the left, that you may prosper wherever you go.

Psalm 19:11

Moreover by them is your servant warned: and in keeping of them there is great reward.

Isaiah 1:19-20

If you are willing and obedient, you shall eat the good of the land:

Philippians 1:27

Only let your manner of life be as it becomes the gospel of Christ: that whether I come and see you, or else be absent, I may hear of your affairs, that you stand fast in one spirit, with one mind striving together for the faith of the gospel;

Treasury of Scripture Knowledge

Summary

Only if thou carefully hearken unto the voice of the LORD thy God, to observe to do all these commandments which I command thee this day.

Bible References

General references

Deuteronomy 4:9
Only take heed to yourself, and keep your soul diligently, lest you forget the things which your eyes have seen, and lest they depart from your heart all the days of your life: but teach them to your sons, and your sons' sons;
Deuteronomy 11:13
And it shall come to pass, if you 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,
Deuteronomy 28:1
And it shall come to pass, if you shall hearken diligently unto the voice of the LORD your God, to observe and to do all his commandments which I command you this day, that the LORD your God will set you on high above all nations of the earth:
Leviticus 26:3
If you walk in my statutes, and keep my commandments, and do them;
Joshua 1:7
Only be strong and very courageous, that you may observe to do according to all the law, which Moses my servant commanded you: turn not from it to the right hand or to the left, that you may prosper wherever you go.
Psalm 19:11
Moreover by them is your servant warned: and in keeping of them there is great reward.
Isaiah 1:19
If you are willing and obedient, you shall eat the good of the land:
Philippians 1:27
Only let your manner of life be as it becomes the gospel of Christ: that whether I come and see you, or else be absent, I may hear of your affairs, that you stand fast in one spirit, with one mind striving together for the faith of the gospel;