Exodus 34:20-22

Amplified Bible

²⁰ You shall redeem the firstborn of a donkey with a lamb; but if you do not redeem it, then you shall break its neck. You shall redeem all the firstborn of your sons. None of you are to appear before Me empty-handed.

²¹ “You shall work for six days, but on the seventh day you shall rest; [even] in plowing time and in harvest you shall rest [on the Sabbath]. ²² You shall observe and celebrate the Feast of Weeks (Harvest, First Fruits, or Pentecost), the first fruits of the wheat harvest, and the Feast of Ingathering (Booths or Tabernacles) at the year’s end.