Deuteronomy 20:13

13 And when thy Lord God hath betaken it in(to) thine hands, thou shalt smite by the sharpness of sword all thing of male kind that is therein, (And when the Lord thy God hath delivered them into thy hands, thou shalt strike down, or shalt kill, with the sharpness of the sword, all the males who be there,)

Deuteronomy 20:13 Meaning and Commentary

Deuteronomy 20:13

And when the Lord thy God hath delivered it into thine hands,
&c.] When, what with pressures without, and calamities within, the city is obliged to surrender: this is not to be imputed to the methods and arts of war used in besieging, or to the courage and skill of the besiegers; but to the power and providence of God succeeding means used, and sending famine or pestilence among the besieged, and inclining their hearts to deliver up their city:

thou shall smite every male thereof with the edge of the sword;
the men in it, grown persons, as distinguished from little ones in the next verse; because it was owing to these it was not surrendered at once, when terms of peace were offered.

Deuteronomy 20:13 In-Context

11 If the city receiveth thy (offer of) peace, and openeth to thee the gates, all the people that is therein shall be saved, and it shall serve thee under tribute. (If the city accepteth thy offer of peace, and they surrender, and they open the gates to thee, then all the people who be there shall become your slaves, and shall serve thee.)

12 But if they will not make bond of peace with thee, and begin battle against thee, thou shalt fight against it. (But if they will not make peace with thee, but begin battle against thee, then thou shalt fight against them.)

13 And when thy Lord God hath betaken it in(to) thine hands, thou shalt smite by the sharpness of sword all thing of male kind that is therein, (And when the Lord thy God hath delivered them into thy hands, thou shalt strike down, or shalt kill, with the sharpness of the sword, all the males who be there,)

14 without women, and young children, beasts, and other things that be in the city. Thou shalt part all the prey to the host, and thou shalt eat of the spoils of thine enemies, which spoils thy Lord God hath given to thee. (but not the women, and the young children, and the beasts, and the other things that be in the city. Thou shalt divide all the prey among the army, and thou shalt eat the spoils of thy enemies, which spoils the Lord thy God hath given thee.)

15 Thus thou shalt do to all the cities, that be full far from thee, and be not of these (nigh) cities which thou shalt take into possession. (Thus thou shalt do, to all the cities that be far away from thee, but not to the cities that be near, which thou shalt take for a possession.)