Psalms 132:12 KJV
If thy children will keep my covenant and my testimony that I shall teach them, their children shall also sit upon thy throne for evermore.
Psalms 132:12, King James Version
In context
11 The Lord hath sworn in truth unto David; he will not turn from it; Of the fruit of thy body will I set upon thy throne.
12 If thy children will keep my covenant and my testimony that I shall teach them, their children shall also sit upon thy throne for evermore.
13 For the Lord hath chosen Zion; he hath desired it for his habitation.