Genesis 27:46 - Joseph Benson’s Commentary on the Old and New Testaments

If Jacob take a wife of the daughters of Heth As Esau has done. More artifice still. This was not the thing she was afraid of. But if we use guile once, we shall be very ready to use it again. It should be carefully observed, that, although a blessing came on Jacob's posterity by his vile lying and dissimulation, yet it brought heavy affliction upon himself, and that for a long term of years. So severely did God punish him personally, for “doing evil that good might come.”