וּמַכֵּ֥ה נֶֽפֶשׁ־בְּהֵמָ֖ה יְשַׁלְּמֶ֑נָּה נֶ֖פֶשׁ תַּ֥חַת נָֽפֶשׁ׃
And he that smiteth a beast mortally shall make it good: life for life.
Read halakhic rulings (Jewish law) on Leviticus 24:18 from the Mishneh Torah and classical halakhic sources, free online.