Exodus 34:19-21

New Revised Standard Version, Anglicised

¹⁹ All that first opens the womb is mine, all your male^[a] livestock, the firstborn of cow and sheep. ²⁰ The firstborn of a donkey you shall redeem with a lamb, or if you will not redeem it you shall break its neck. All the firstborn of your sons you shall redeem.

No one shall appear before me empty-handed.

²¹ For six days you shall work, but on the seventh day you shall rest; even in ploughing time and in harvest time you shall rest.