Leviticus 23:23-25 - The Feast Of Trumpets

²³ And the LORD spake unto Moses, saying, ²⁴ "Speak unto the children of Israel, and say, 'The first day of the seventh month shall be a rest of remembrance unto you, to blow horns in a holy feast it shall be, ²⁵ and ye shall do no laborious work therein, and ye shall offer sacrifice unto the LORD.'"