Exodus 23:17
Thrice a year shall all thy males appear before the Lord thy God.

Exodus 34:22
Thou shalt keep the feast of weeks with the firstfruits of the corn of thy wheat harvest, and the feast when the time of the year returneth that all things are laid in.

Exodus 34:23
Three times in the year all thy males shall appear in the sight of the almighty Lord the God of Israel.

Leviticus 23:4
These also are the holy days of the Lord, which you must celebrate in their seasons.

Deuteronomy 16:16
Three times in a year shall all thy males appear before the Lord thy God in the place which he shall choose: in the feast of unleavened bread, in the feast of weeks, and in the feast of tabernacles. No one shall appear with his hands empty before the Lord:

1 Samuel 1:3
And this man went up out of his city upon the appointed days, to adore and to offer sacrifice to the Lord of hosts in Silo. And the two sons of Heli, Ophni and Phinees, were there priests of the Lord.

1 Kings 9:25
Solomon also offered three times every year holocausts, and victims of peace offerings, upon the altar which he had built to the Lord, and he burnt incense before the Lord: and the temple was finished.

2 Chronicles 8:13
That every day an offering might be made on it according to the ordinance of Moses, in the sabbaths, and on the new moons, and on the festival days three times a year, that is to say, in the feast of unleavened bread, and in the feast of weeks, and in the feast of tabernacles.