Exodus 34:20
But the firstling of an ass you shall redeem with a lamb: and if you redeem him not, then shall you break his neck. All the firstborn of your sons you shall redeem. And none shall appear before me empty.
Torrey's Topical Textbook—AKJV

Deuteronomy 16:16,17
Three times in a year shall all your males appear before the LORD your God in the place which he shall choose; in the feast of unleavened bread, and in the feast of weeks, and in the feast of tabernacles: and they shall not appear before the LORD empty:
Torrey's Topical Textbook—AKJV