Leviticus 23:37

“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:

So Moses spoke to the sons of Israel the appointed times of Yahweh.

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.

“You shall celebrate the Feast of Booths seven days after you have gathered in from your threshing floor and your wine vat;

So Solomon celebrated the feast at that time, and all Israel with him, a great assembly from Lebo-hamath to the brook of Egypt, before Yahweh our God, for seven days and seven more days, even fourteen days.

“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.”

“In the seventh month, on the fifteenth day of the month, at the feast, he shall provide like this, seven days for the sin offering, the burnt offering, the grain offering, and the oil.”

Then it will be that any who are left of all the nations that went against Jerusalem will go up from year to year to worship the King, Yahweh of hosts, and to celebrate the Feast of Booths.