Exodus 23:15

“This month shall be the beginning of months for you; it is to be the first month of the year to you.

‘Seven days you shall eat unleavened bread, but on the first day you shall remove leaven from your houses; for whoever eats anything leavened from the first day until the seventh day, that person shall be cut off from Israel.

‘Seven days there shall be no leaven found in your houses; for whoever eats what is leavened, that person shall be cut off from the congregation of Israel, whether he is a sojourner or a native of the land.

“This day, in the month of Abib, you are going out.

“And you shall redeem with a lamb the first offspring from a donkey; and if you do not redeem it, then you shall break its neck. You shall redeem all the firstborn of your sons. None shall appear before Me empty-handed.

“Three times a year all your males are to appear before the Lord Yahweh, the God of Israel.

‘Then on the fifteenth day of the same month there is the Feast of Unleavened Bread to Yahweh; for seven days you shall eat unleavened bread.

‘And on the fifteenth day of this month shall be a feast; unleavened bread shall be eaten for seven days.

“Three times in a year all your males shall appear before Yahweh your God in the place which He chooses, at the Feast of Unleavened Bread and at the Feast of Weeks and at the Feast of Booths, and they shall not appear before Yahweh empty-handed.

So they said, “If you send away the ark of the God of Israel, do not send it empty; but you shall surely return to Him a guilt offering. Then you will be healed, and it will be known to you why His hand is not turned away from you.”

And three times in a year Solomon offered burnt offerings and peace offerings on the altar which he built to Yahweh, burning incense with them on the altar which was before Yahweh. So he finished the house.

and did so according to the daily rule, offering them up according to the commandment of Moses, for the sabbaths, the new moons and the three annual feasts—the Feast of Unleavened Bread, the Feast of Weeks and the Feast of Booths.

“I gave them My statutes and made them know My judgments, which, if a man does them, he will live by them.

And His parents would go to Jerusalem every year at the Feast of the Passover.

And when he saw that it pleased the Jews, he proceeded to arrest Peter also. Now it was during the days of Unleavened Bread.