Deuteronomy 20:13 in the World English Bible
When the LORD your God delivers it into your hand, you shall strike every male of it with the edge of the sword;
Context
12 And if it will make no peace with thee, but will make war against thee, then thou shalt besiege it:
13 And when the LORD thy God hath delivered it into thine hands, thou shalt smite every male thereof with the edge of the sword:
14 But the women, and the little ones, and the cattle, and all that is in the city, even all the spoil thereof, shalt thou take unto thyself; and thou shalt eat the spoil of thine enemies, which the LORD thy God hath given thee.