Exodus 23:14-17

¹⁴“Three times a year you shall celebrate a feast to Me. ¹⁵You shall observe the Feast of Unleavened Bread; for seven days you are to eat unleavened bread, as I commanded you, at the appointed time in the month Abib, for in it you came out of Egypt. And none shall appear before Me empty-handed. ¹⁶Also you shall observe the Feast of the Harvest of the first fruits of your labors from what you sow in the field; also the Feast of the Ingathering at the end of the year when you gather in the fruit of your labors from the field. ¹⁷Three times a year all your males shall appear before the Lord God.