Deuteronomy 15:5

if only you diligently listen to the voice of the LORD your God, to observe to do all this commandment 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 saw, and lest they depart from your heart all the days of your life; but make them known to your children and your children's children;

Deuteronomy 11:13-15

It shall happen, if you shall listen diligently to 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

It shall happen, if you shall listen diligently to the voice of the LORD your God, to observe to do all his commandments which I command you this day, that the LORD your God will set you on high above all the nations of the earth:

Joshua 1:7

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

Psalm 19:11

Moreover by them is your servant warned. In keeping 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 worthy of the Good News of Christ, that, whether I come and see you or am absent, I may hear of your state, that you stand firm in one spirit, with one soul striving for the faith of the Good News;

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 saw, and lest they depart from your heart all the days of your life; but make them known to your children and your children's children;
Deuteronomy 11:13
It shall happen, if you shall listen diligently to 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
It shall happen, if you shall listen diligently to the voice of the LORD your God, to observe to do all his commandments which I command you this day, that the LORD your God will set you on high above all the 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, to observe to do according to all the law, which Moses my servant commanded you. Do not turn from it to the right hand or to the left, that you may have good success wherever you go.
Psalm 19:11
Moreover by them is your servant warned. In keeping 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 worthy of the Good News of Christ, that, whether I come and see you or am absent, I may hear of your state, that you stand firm in one spirit, with one soul striving for the faith of the Good News;