Deuteronomy 29:9

Therefore keep the words of this covenant, and do them, that you may prosper in all that you do.

Surrounding context

29:8 We took their land and gave it as an inheritance to the Reubenites, to the Gadites, and to half the tribe of Manasseh.

29:9 Therefore keep the words of this covenant, and do them, that you may prosper in all that you do.

29:10 "All of you stand today before the LORD your God: your leaders and your tribes and your elders and your officers, all the men of Israel,

Translation and sources