Deuteronomy 21:9

9 So shalt thou put away innocent blood from thy midst, when thou shalt do what is right in the eyes of Jehovah.

Deuteronomy 21:9 Meaning and Commentary

Deuteronomy 21:9

So shalt thou put away the guilt of innocent blood from among
you
Which otherwise, the person not being found out, and brought to just punishment for it, would devolve upon the whole. Aben Ezra interprets it the punishment of innocent blood, which, by the above method being taken, would not be inflicted on them:

when thou shalt do that which is right in the sight of the Lord;
as it was to observe this law concerning the beheading of the heifer, with all the rites and ceremonies belonging to it here enjoined; as well as every other command, statute, and ordinance of the Lord, which are all right to be done, ( Psalms 19:8 ) .

Deuteronomy 21:9 In-Context

7 and shall answer and say, Our hands have not shed this blood, neither have our eyes seen it.

8 Forgive thy people Israel, whom thou, Jehovah, hast redeemed, and lay not innocent blood to the charge of thy people Israel; and the blood shall be expiated for them.

9 So shalt thou put away innocent blood from thy midst, when thou shalt do what is right in the eyes of Jehovah.

10 When thou goest forth to war against thine enemies, and Jehovah thy God delivereth them into thy hands, and thou hast taken captives of them,

11 and thou seest among the captives a woman of beautiful form, and hast a desire unto her, and takest her as thy wife;