Exodus 34:19-21

The Voice

¹⁹ All the firstborn belong to Me. Every male animal from your livestock, both cattle and sheep, that opens the womb is Mine. ²⁰ You may redeem the firstborn of a donkey with a lamb. If you choose not to redeem it, then you are to break its neck. Redeem all of your firstborn sons as well. No one may appear before Me empty-handed.

²¹ You are to work for six days; but when the seventh day arrives, you are to observe the Sabbath and rest. Even when it is the time to plow and harvest, you must still rest on the seventh day.