Exodus 23:14; Deuteronomy 16:16

14 pThree times in the year you shall keep a feast to me.

16 bThree 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. cThey shall not appear before the Lord empty-handed.