Genesis 28:9 in the World English Bible
So Esau went to Ishmael, and took, in addition to the wives that he had, Mahalath the daughter of Ishmael, Abraham’s son, the sister of Nebaioth, to be his wife.
Context
8 And Esau seeing that the daughters of Canaan pleased not Isaac his father;
9 Then went Esau unto Ishmael, and took unto the wives which he had Mahalath the daughter of Ishmael Abraham’s son, the sister of Nebajoth, to be his wife.
10 And Jacob went out from Beer-sheba, and went toward Haran.