Deuteronomy 19:21
You shall not show pity [to the guilty one]: it shall be life for life, eye for eye, tooth for tooth, hand for hand, foot for foot.
Deuteronomy 19:13
You shall not pity him [the guilty one], but you shall purge the blood of the innocent from Israel, so that it may go well with you.
Exodus 21:23-25
But if there is any further injury, then you shall require [as a penalty] life for life,
Leviticus 24:17-21
‘If a man takes the life of any human being [unlawfully], he shall most certainly be put to death.
Matthew 5:38-39