Then went Esau unto Ishmael - Those who are apt to take every thing by the wrong handle, and who think it was utterly impossible for Esau to do any right action, have classed his taking a daughter of Ishmael among his crimes; whereas there is nothing more plain than that he did this with a sincere desire to obey and please his parents. Having heard the pious advice which Isaac gave to Jacob, he therefore went and took a wife from the family of his grandfather Abraham, as Jacob was desired to do out of the family of his maternal uncle Laban. Mahalath, whom he took to wife, stood in the same degree of relationship to Isaac his father as Rachel did to his mother Rebekah. Esau married his father's niece; Jacob married his mother's niece. It was therefore most obviously to please his parents that Esau took this additional wife. It is supposed that Ishmael must have been dead thirteen or fourteen years before this time, and that going to Ishmael signifies only going to the family of Ishmael. If we follow the common computation, and allow that Isaac was now about one hundred and thirty-six or one hundred and thirty-seven years of age, and Jacob seventy-seven, and as Ishmael died in the one hundred and thirty-seventh year of his age, which according to the common computation was the one hundred and twenty-third of Isaac, then Ishmael must have been dead about fourteen years. But if we allow the ingenious reasoning of Mr. Skinner and Dr. Kennicott, that Jacob was at this time only fifty-seven years of age, and Isaac consequently only one hundred and seventeen, it will appear that Ishmael did not die till six years after this period; and hence with propriety it might be said, Esau went unto Ishmael, and took Mahalath the daughter of Ishmael to be his wife. See note on Genesis 26:34, etc.

Then went Esau unto Ishmael,.... Not to Ishmael in person, for he was now dead, Genesis 25:17, and had been dead as is reckoned about fourteen years before this, but to the house of Ishmael:

and took unto the wives which he had; the daughters of Heth, and who seem by this to be both alive at this time:

Mahalath the daughter of Ishmael, Abraham's son; the same with Bashemath, Genesis 36:3; as the Targum of Jonathan expresses it, this person having two names, and is further described:

the sister of Nebajoth, to be his wife; who was the eldest son of Ishmael, and, his father being dead, was the principal in the family; and this woman Esau took to wife was his sister by his mother's side, as the above Targum expresses, as well as by his father's; whereas he might have other sisters only by his father's side, he having had more wives than one. This Esau seems to have done in order to curry favour with his father, who was displeased with his other wives, and therefore takes one of his father's brother's daughters; but in this he acted an unwise part, on more accounts than one; partly as it was taking to wife the daughter of one that was cast out of his grandfather's house, and had been a persecutor of his father, and therefore not likely to be agreeable to him; and partly as being a daughter of the bondmaid's son: children born of her could not inherit the land promised to Abraham and Isaac.

Then went Esau unto Ishmael, and took unto the wives which he had Mahalath the daughter of {c} Ishmael Abraham's son, the sister of Nebajoth, to be his wife.

(c) Thinking by this to have reconciled himself to his father, but all in vain: for he does not take away the cause of the evil.

Mahalath: or, Bashemath

Margin Mahalath

Gen 36:3 is called Bashemath:

28:6-9 Good examples impress even the profane and malicious. But Esau thought, by pleasing his parents in one thing, to atone for other wrong doings. Carnal hearts are apt to think themselves as good as they should be, because in some one matter they are not so bad as they have been.