John Gills Exposition of the Bible Commentary - Genesis 38:11
Then said Judah to Tamar his daughter in law ,.... After the death of his two sons, who had successively married her: remain a widow at thy father's house till Shelah my son be grown : who was his third and youngest son, though perhaps not more than a year younger than Onan; but he might not choose he should marry so soon as his brethren had done, for a reason following: according to the custom and law of marrying a brother's wife, who died without issue, she in course was to be the wife... read more
Matthew Henry's Complete Commentary - 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.... read more