Targum for Exodus 22:29
כֵּֽן־תַּעֲשֶׂ֥ה לְשֹׁרְךָ֖ לְצֹאנֶ֑ךָ שִׁבְעַ֤ת יָמִים֙ יִהְיֶ֣ה עִם־אִמּ֔וֹ בַּיּ֥וֹם הַשְּׁמִינִ֖י תִּתְּנוֹ־לִֽי׃
Likewise shalt thou do with thine oxen, and with thy sheep; seven days it shall be with its dam; on the eighth day thou shalt give it Me.
Targum Jonathan on Exodus
So shalt thou do with the firstlings of thy oxen and sheep; seven days it shall be suckled by its mother, and on the eighth day thou shalt separate it before Me.
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