Deuteronomy 20:11
If they accept your offer of peace and open their gates, all the people there will become forced laborers to serve you.
Berean Standard Bible
And it shall be, if it make thee answer of peace, and open unto thee, then it shall be, that all the people that is found therein shall be tributaries unto thee, and they shall serve thee.
It shall be, if it gives you answer of peace and opens to you, then it shall be that all the people who are found therein shall become forced laborers to you, and shall serve you.