Leviticus 23:36 For seven days you shall offer an offering made by fire to the LORD. On the eighth day you shall have a holy convocation, and you shall offer an offering made by fire to the LORD. It is a sacred assembly, and you shall do no customary work on it.
Deuteronomy 16:8 Six days you shall eat unleavened bread, and on the seventh day there shall be a sacred assembly to the LORD your God. You shall do no work on it.
Numbers 29:35-38 ‘On the eighth day you shall have a sacred assembly. You shall do no customary work. You shall present a burnt offering, an offering made by fire as a sweet aroma to the LORD: one bull, one ram, seven lambs in their first year without blemish, and their grain offering and their drink offerings for the bull, for the ram, and for the lambs, by their number, according to the ordinance; also one goat as a sin offering, besides the regular burnt offering, its grain offering, and its drink offering.
Nehemiah 8:18 Also day by day, from the first day until the last day, he read from the Book of the Law of God. And they kept the feast seven days; and on the eighth day therewas a sacred assembly, according to the prescribed manner.
2 Chronicles 7:9 And on the eighth day they held a sacred assembly, for they observed the dedication of the altar seven days, and the feast seven days.
Isaiah 1:13 Bring no more futile sacrifices; Incense is an abomination to Me. The New Moons, the Sabbaths, and the calling of assemblies— I cannot endure iniquity and the sacred meeting.
Joel 1:14 Consecrate a fast, Call a sacred assembly; Gather the elders And all the inhabitants of the land Into the house of the LORD your God, And cry out to the LORD.
Joel 2:15-16 Blow the trumpet in Zion, Consecrate a fast, Call a sacred assembly; Gather the people, Sanctify the congregation, Assemble the elders, Gather the children and nursing babes; Let the bridegroom go out from his chamber, And the bride from her dressing room.