Exodus 34:19-21

King James Version

¹⁹ All that openeth the matrix is mine; and every firstling among thy cattle, whether ox or sheep, that is male.

²⁰ But the firstling of an ass thou shalt redeem with a lamb: and if thou redeem him not, then shalt thou break his neck. All the firstborn of thy sons thou shalt redeem. And none shall appear before me empty.

²¹ Six days thou shalt work, but on the seventh day thou shalt rest: in earing time and in harvest thou shalt rest.