Leviticus 23:4

‘Now this day will be a memorial to you, and you shall celebrate it as a feast to Yahweh; throughout your generations you are to celebrate it as a perpetual statute.

“Speak to the sons of Israel and say to them, ‘The appointed times of Yahweh which you shall proclaim as holy convocations—My appointed times are these:

‘On this same day you shall make a proclamation as well; it shall be a holy convocation for you. You shall do no laborious work. It is to be a perpetual statute in all your places of habitation throughout your generations.

then make an offering by fire to Yahweh, a burnt offering or a sacrifice to fulfill a special vow, or as a freewill offering or in your appointed times, to make a soothing aroma to Yahweh, from the herd or from the flock.

and to offer all burnt offerings to Yahweh, on the sabbaths, the new moons and the appointed times in the number set by the judgments concerning them, continually before Yahweh.

and that they should make the report heard and make a proclamation of it pass throughout all their cities and in Jerusalem, saying, “Go out to the hills, and bring olive branches and wild olive branches, myrtle branches, palm branches, and branches of other leafy trees, to make booths, as it is written.”

“And in a dispute, they shall take their stand to judge; they shall judge it according to My judgments. They shall also keep My laws and My statutes in all My appointed times and keep My sabbaths holy.

“And it shall be the prince’s part to provide the burnt offerings, the grain offerings, and the drink offerings, at the feasts, on the new moons, and on the sabbaths, at all the appointed times of the house of Israel; he shall provide the sin offering, the grain offering, the burnt offering, and the peace offerings, to make atonement for the house of Israel.”

Behold, on the mountains the feet of him who proclaims good news, Who announces peace! Celebrate your feasts, O Judah; Pay your vows. For never again will the vile one pass through you; He is cut off completely.

The Passover