Three times a year you are to celebrate a feast to Me.

Exodus 23:17
Three times a year all your males are to appear before the Lord GOD.

Exodus 34:22
And you are to celebrate the Feast of Weeks with the firstfruits of the wheat harvest, and the Feast of Ingathering at the turn of the year.

Exodus 34:23
Three times a year all your males are to appear before the Lord GOD, the God of Israel.

Leviticus 23:4
These are the LORD's appointed feasts, the sacred assemblies you are to proclaim at their appointed times.

Deuteronomy 16:16
Three times a year all your men are to appear before the LORD your God in the place He will choose: at the Feast of Unleavened Bread, the Feast of Weeks, and the Feast of Tabernacles. No one should appear before the LORD empty-handed.

1 Samuel 1:3
Year after year Elkanah would go up from his city to worship and sacrifice to the LORD of Hosts at Shiloh, where Eli's two sons, Hophni and Phinehas, were priests to the LORD.

1 Kings 9:25
Three times a year Solomon offered burnt offerings and peace offerings on the altar he had built for the LORD, burning incense with them before the LORD. So he completed the temple.

2 Chronicles 8:13
He observed the daily requirement for offerings according to the commandment of Moses for Sabbaths, New Moons, and the three annual appointed feasts--the Feast of Unleavened Bread, the Feast of Weeks, and the Feast of Tabernacles.

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