Verse 16. - And he turned unto her by the way, and said, Go to, I pray thee, let me come in unto thee; (for he knew not that she was his daughter-in-law). Though willing to commit adultery or fornication, Judah would have shrank from the sin of incest. And she said, What wilt thou give me, that thou mayest come in unto me? The conduct of Tamer, though in every way reprehensible, is not to be attributed to mere lust, or inordinate desire for offspring, if not from the son Shelah, then from the father Judah, but was probably traceable to a secret wish on the one hand to be avenged on Judah, and on the other hand to assert her right to a place amongst the ancestresses of the patriarchal family. Yet Tamar was really guilty of both adultery and incest, though Lange thinks the wickedness of Er and Onan renders this open to question.

38:1-30 The profligate conduct of Judah and his family. - This chapter gives an account of Judah and his family, and such an account it is, that it seems a wonder that of all Jacob's sons, our Lord should spring out of Judah, Heb 7:14. But God will show that his choice is of grace and not of merit, and that Christ came into the world to save sinners, even the chief. Also, that the worthiness of Christ is of himself, and not from his ancestors. How little reason had the Jews, who were so called from this Judah, to boast as they did, Joh 8:41. What awful examples the Lord proclaims in his punishments, of his utter displeasure at sin! Let us seek grace from God to avoid every appearance of sin. And let that state of humbleness to which Jesus submitted, when he came to put away sin by the sacrifice of himself, in appointing such characters as those here recorded, to be his ancestors, endear the Redeemer to our hearts.And he turned unto her by the way,.... Which led to her; he turned out of the way in which he was to that where she sat; and very probably it was at some little distance from the way, and therefore he turned aside to it, his lust towards her being excited at the sight of her; perhaps he left his friend Hirah the Adullamite, and sent him on his way, while he committed the following crime:

and said, go to, I pray thee, let me come in unto thee; that is, lie with her:

for he knew not that she was his daughter in law; or otherwise, it is suggested by the historian, he would not have offered such a thing to her; but though this may excuse him from wilful incest, yet not from fornication; for he took her to be an harlot, and however knew she was not his wife, and whom he ought not to have had any concern with in such a manner:

and she said, what wilt thou give me, that thou mayest come in unto me? perhaps she said this with a very low voice, that he might not know her by it; and she behaved like an harlot by requiring an hire, on condition of which she consented: she knew Judah though he did not know her, and therefore cannot be excused from wilful incest: some indeed extenuate her crime, by supposing that she, though a Canaanite, was become a proselyte to the true religion by marrying into Judah's family, and had knowledge of the Messiah being to be born of Jacob's line; and therefore was desirous of being the mother or ancestor at least of that great Person, and so took this method; that since she could not have the son for her husband, was desirous of enjoying the father, not for the gratification of her lust, but in hopes of the promised seed; and accordingly she has a place in the genealogy of the Messiah, Matthew 1:3.