Matthew Henry on Genesis 38:1-11
Here is, 1. Judah's foolish friendship with a Canaanite-man. He went down from his brethren, and withdrew for a time from their society and his father's family, and got to be intimately acquainted with one Hirah, an Adullamite, Gen 38:1. It is computed that he was now not much above fifteen or sixteen years of age, an easy prey to the tempter. Note, When young people that have been well educated begin to change their company, they will soon change their manners, and lose their good education. Those that go down from their brethren, that despise and forsake the society of the seed of Israel, and pick up Canaanites for their companions, are going down the hill apace. It is of great consequence…
Read the whole note in the consoleJamieson-Fausset-Brown on Genesis 38:2
And Judah saw there a daughter of a certain Canaanite--Like Esau [Gen 26:34], this son of Jacob, casting off the restraints of religion, married into a Canaanite family; and it is not surprising that the family which sprang from such an unsuitable connection should be infamous for bold and unblushing wickedness.
Adam Clarke on Genesis 38:5
And he was at Chezib when she bare him - This town is supposed to be the same with Achzib, which fell to the tribe of Judah, Jos 15:44. "The name," says Ainsworth, "has in Hebrew the signification of lying; and to it the prophet alludes, saying the houses of Achzib shall be (Achzab) a lie to the kings of Israel, Mic 1:14."
John Gill on Genesis 38:6
And Judah took a wife for Er his firstborn,.... Chose one for him, and presented her to him for his liking, whom he approving of married:
whose name was Tamar; which signifies a "palm tree": the Targum of Jonathan says, she was the daughter of Shem; but it is altogether improbable that a daughter of his should be living at this time, and young enough to bear children: it is much more probable that she was daughter of Levi, Judah's brother, as an Arabic writer (o) asserts; but it is more likely still that she was the daughter of a Canaanite, who was living in the same place, though his name is not mentioned, Genesis 38:11.
(o) Abulpharag. Hist. Dynast. p. 16.