Genesis 38:30

And afterward came out his brother, that had the scarlet thread upon his hand; and his name was called Zarah (rising), because he wanted to appear first. The entire story of Tamar, with all the attendant sins, is here told because Pharez, the son of harlotry, became one of the ancestors of Christ, whose suffering and death atoned also for these sins of His forefathers, whose perfect righteousness covers the sin and shame of all men. Cf Matthew 1:3.