וְשׁ֖וֹר אוֹ־שֶׂ֑ה אֹת֣וֹ וְאֶת־בְּנ֔וֹ לֹ֥א תִשְׁחֲט֖וּ בְּי֥וֹם אֶחָֽד׃
And whether it be cow or ewe, ye shall not kill it and its young both in one day.
Targum Jonathan on Leviticus
Sons of Israel, my people, as our Father in heaven is merciful, so shall you be merciful on earth: neither cow, nor ewe, shall you sacrifice along with her young on the same day.