Leviticus 23:26

“…persons we should be when we fast, and of what character the fast should be, listen again to God commanding Moses, and saying, as it is written in Leviticus, ‘And the Lord spake unto Moses, saying, In the tenth day of this seventh month, there shall be a day of atonement; a convocation, and a holy day shall it be…” — editor's note: Levit. xxiii. 26, sq.

“…“Holy shall be to you the day, and ye shall vex your souls; and every soul which shall not have been vexed in that day shall be exterminated from his people.”” — editor's note: Lev. xvi. 29; xxiii. 26–29.

“We proclaim the holy Fast of the Seventh Month, dearly-beloved, for the exercise of common devotions, confidently inciting you with fatherly exhortations to make Christian by your observance that which was formerly Jewish.” — editor's note: The observances of the seventh month, especially of the Day of Atonement, will be found in Lev. xxiii. 26–44, and Numbers xxix.