Deuteronomy 21:9

9 By following these instructions, you will do what is right in the LORD ’s sight and will cleanse the guilt of murder from your community.

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 Then they must say, ‘Our hands did not shed this person’s blood, nor did we see it happen.

8 O LORD, forgive your people Israel whom you have redeemed. Do not charge your people with the guilt of murdering an innocent person.’ Then they will be absolved of the guilt of this person’s blood.

9 By following these instructions, you will do what is right in the LORD ’s sight and will cleanse the guilt of murder from your community.

10 “Suppose you go out to war against your enemies and the LORD your God hands them over to you, and you take some of them as captives.

11 And suppose you see among the captives a beautiful woman, and you are attracted to her and want to marry her.