Verse 18

For this reason, it has been ordained regarding the Israelites that they should be distressed on the tenth of the seventh month — on the day when (the news) which made (him) lament Joseph reached his father Jacob — in order to make atonement for themselves on it with a kid — on the tenth of the seventh month, once a year — for their sins. For they had saddened their father’s (feelings of) affection for his son Joseph.