Deuteronomy 23:6

You shall never seek their peace or their prosperity all your days.

Ezra 9:12

So now do not give your daughters to their sons nor take their daughters to your sons, and never seek their peace or their prosperity, that you may be strong and eat the good things of the land and leave it as an inheritance to your sons forever.’

2 Samuel 8:2

He defeated Moab, and measured them with the line, making them lie down on the ground; and he measured two lines to put to death and one full line to keep alive. And the Moabites became servants to David, bringing tribute.

2 Samuel 12:31

He also brought out the people who were in it, and set them under saws, sharp iron instruments, and iron axes, and made them pass through the brickkiln. And thus he did to all the cities of the sons of Ammon. Then David and all the people returned to Jerusalem.

Nehemiah 13:23-25

In those days I also saw that the Jews had married women from Ashdod, Ammon and Moab.

Treasury of Scripture Knowledge

Summary

Thou shalt not seek their peace nor their prosperity all thy days for ever.

Bible References

Thou shalt

2 Samuel 8:2
He defeated Moab, and measured them with the line, making them lie down on the ground; and he measured two lines to put to death and one full line to keep alive. And the Moabites became servants to David, bringing tribute.
2 Samuel 12:31
He also brought out the people who were in it, and set them under saws, sharp iron instruments, and iron axes, and made them pass through the brickkiln. And thus he did to all the cities of the sons of Ammon. Then David and all the people returned to Jerusalem.
Ezra 9:12
So now do not give your daughters to their sons nor take their daughters to your sons, and never seek their peace or their prosperity, that you may be strong and eat the good things of the land and leave it as an inheritance to your sons forever.’
Nehemiah 13:23
In those days I also saw that the Jews had married women from Ashdod, Ammon and Moab.