13 Show no pity. You must purge from Israel the guilt of shedding innocent blood, so that it may go well with you.

Read Deuteronomy 19:13 Using Other Translations

Thine eye shall not pity him, but thou shalt put away the guilt of innocent blood from Israel, that it may go well with thee.
Your eye shall not pity him, but you shall purge the guilt of innocent blood from Israel, so that it may be well with you.
Do not feel sorry for that murderer! Purge from Israel the guilt of murdering innocent people; then all will go well with you.