Vayikra 22:26-28

Orthodox Jewish Bible

²⁶ And Hashem spoke unto Moshe, saying,

²⁷ When a bull, or a sheep, or a goat, is brought forth, then it shall be seven days with its mother; and from the yom hashemini and thenceforth it shall be accepted for a korban isheh (offering made by eish) unto Hashem.

²⁸ And whether it be an ox or seh, ye shall not slaughter (shachat) it and her young both in yom echad.