Deuteronomy 19:21 Midrash

וְלֹ֥א תָח֖וֹס עֵינֶ֑ךָ נֶ֣פֶשׁ בְּנֶ֗פֶשׁ עַ֤יִן בְּעַ֙יִן֙ שֵׁ֣ן בְּשֵׁ֔ן יָ֥ד בְּיָ֖ד רֶ֥גֶל בְּרָֽגֶל׃ (ס)

And thine eye shall not pity: life for life, eye for eye, tooth for tooth, hand for hand, foot for foot.

Read midrashic interpretation of Deuteronomy 19:21: and classical rabbinic exegesis.