Leviticus 23:34 in the King James Version
Speak unto the children of Israel, saying, The fifteenth day of this seventh month shall be the feast of tabernacles for seven days unto the LORD.
Context
33 The LORD spoke to Moses, saying,
34 “Speak to the children of Israel, and say, ‘On the fifteenth day of this seventh month is the feast of booths for seven days to the LORD.
35 On the first day shall be a holy convocation. You shall do no regular work.