מַכֵּ֥ה אִ֛ישׁ וָמֵ֖ת מ֥וֹת יוּמָֽת׃
He that smiteth a man, so that he dieth, shall surely be put to death.
Read Jewish philosophy on Exodus 21:12: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.