Exodus 34:19-21

American Standard Version

¹⁹ All that openeth the womb is mine; and all thy cattle that is male, the firstlings of cow and sheep. ²⁰ And the firstling of an ass thou shalt redeem with a ^[a]lamb: and if thou wilt not redeem it, then thou shalt break its neck. All the first-born 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 plowing time and in harvest thou shalt rest.