Leviticus 19:37

"Therefore shall ye observe all my statutes, and all my judgments, and do them: I am the LORD."

Cross References (ranked by relevance)

All the commandments which I command thee this day shall ye observe to do, that ye may live, and multiply, and go in and possess the land which the LORD sware unto your fathers.

Deuteronomy 5:1

And Moses called all Israel, and said unto them, Hear, O Israel, the statutes and judgments which I speak in your ears this day, that ye may learn them, and keep, and do them.

Psalm 119:34

Give me understanding, and I shall keep thy law; yea, I shall observe it with my whole heart.

Psalm 119:4

Thou hast commanded us to keep thy precepts diligently.