Exodus 23:14-17

14 aThree times in the year you shall keep a feast to me. 15 bYou shall keep the Feast of Unleavened Bread. As I commanded you, you shall eat unleavened bread for seven days at the appointed time in the month of cAbib, for in it you came out of Egypt. dNone shall appear before me empty-handed. 16You shall keep ethe Feast of Harvest, of the firstfruits of your labor, of what you sow in the field. You shall keep the fFeast of Ingathering at the end of the year, when you gather in from the field the fruit of your labor. 17 gThree times in the year shall all your males appear before the Lord God.

Exodus 34:23

23 hThree times in the year shall all your males appear before the Lord God, the God of Israel.

Deuteronomy 16:16

16 iThree times a year all your males shall appear before the Lord your God at the place that he will choose: at the Feast of Unleavened Bread, at the Feast of Weeks, and at the Feast of Booths. jThey shall not appear before the Lord empty-handed.

2 Chronicles 8:12-13

12Then Solomon offered up burnt offerings to the Lord on the altar of the Lord kthat he had built before the vestibule, 13 las the duty of each day required, offering maccording to the commandment of Moses for the Sabbaths, the new moons, and the nthree annual feasts—the Feast of Unleavened Bread, the Feast of Weeks, and the Feast of Booths.
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