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33Yahweh spoke to Moses, saying, 34Speak to the children of Israel, saying, On the fifteenth day of this seventh month is the feast of tents for seven days to Yahweh. 35On the first day shall be a holy convocation: you shall do no servile work. 36Seven days you shall offer an offering made by fire to Yahweh: on the eighth day shall be a holy convocation to you; and you shall offer an offering made by fire to Yahweh: it is a solemn assembly; you shall do no servile work.
Leviticus 23:33-36 (WEB)