Deuteronomy Chapter 20, Verse 16
From BibleWiki
16: But of the cities of these people, which the LORD thy God doth
give thee for an inheritance, thou shalt save alive nothing
that breatheth:
16: But of those cities that shall be given thee, thou shalt suffer
none at all to live:
16: [Of these] ye shall not take any thing alive;
Deuteronomy Chapter 20, Verse 16/commentary

