Exodus 34:20

20 Redeem the firstborn donkey with a lamb, but if you do not redeem it, break its neck. Redeem all your firstborn sons. “No one is to appear before me empty-handed.

Read Exodus 34:20 Using Other Translations

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.
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. And none shall appear before me empty-handed.
A firstborn donkey may be bought back from the LORD by presenting a lamb or young goat in its place. But if you do not buy it back, you must break its neck. However, you must buy back every firstborn son. “No one may appear before me without an offering.

What does Exodus 34:20 mean?

John Gill's Exposition of the Bible
Exodus 34:20

Every firstling of an ass thou shalt redeem
This goes along with the former, (See Gill on Exodus 13:13):

and none shall appear before me empty;
at the grand festivals, the passover, pentecost, and tabernacles, (See Gill on Exodus 13:15).

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