Leviticus 22:26-28

Young's Literal Translation

²⁶ And Jehovah speaketh unto Moses, saying,

²⁷ `When ox or lamb or goat is born, and it hath been seven days under its dam, then from the eighth day and henceforth, it is pleasing for an offering, a fire-offering to Jehovah;

²⁸ but an ox or sheep -- it and its young one, ye do not slaughter in one day.