Deuteronomy 6:22-25

and Jehovah showed signs and wonders, great and sore, upon Egypt, upon Pharaoh, and upon all his house, before our eyes; and he brought us out from thence, that he might bring us in, to give us the land which he sware unto our fathers. And Jehovah commanded us to do all these statutes, to fear Jehovah our God, for our good always, that he might preserve us alive, as at this day. And it shall be righteousness unto us, if we observe to do all this commandment before Jehovah our God, as he hath commanded us.