Exodus 34:20
But the firstling of an ass you shall redeem with a lamb: and if you redeem not, then shall you break his neck. All the firstborn of your sons you shall redeem. And none shall appear before me empty.
ā The Restored Word Bible
Context
18 The feast of unleavened bread shall you keep. Seven days you shall eat unleavened bread, as I commanded you, in the time of the month Abib: for in the month Abib you camest out from Egypt.
19 All that openeth the matrix mine; and every firstling among your cattle, ox or sheep, .
20 But the firstling of an ass you shall redeem with a lamb: and if you redeem not, then shall you break his neck. All the firstborn of your sons you shall redeem. And none shall appear before me empty.
21 Six days you shall work, but on the seventh day you shall rest: in earing time and in harvest you shall rest.
22 And you shall observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end.