Genesis 38:16

16.What wilt thou give me, etc. Tamar did not wish to make a gain by the prostitution of her person, but to have a certain pledge, in order that she might boast of the revenge taken for the injury she had received: and indeed there is no doubt that God blinded Judah, as he deserved; for how did it happen that he did not know the voice of his daughter-in-law, with which he had been long familiar? Besides, if a pledge must be given for the promised kid, what folly to deliver up his ring to a harlot? I pass over the absurdity of his giving a double pledge. It appears, therefore, that he was then bereft of all judgment; and for no other cause are these things written by Moses, than to teach us that his miserable mind was darkened by the just judgment of God, because, by heaping sin upon sin, he had quenched the light of the Spirit.