So Sarai, Abram's wife, took Hagar her Egyptian maid, after Abram had dwelt ten years in the land of Canaan, and gave her to her husband Abram to be his [secondary] wife.
Then Sarai said to Abram, May [the responsibility for] my wrong and deprivation of rights be upon you! I gave my maid into your bosom, and when she saw that she was with child, I was contemptible and despised in her eyes. May the Lord be the judge between you and me.
Now Hagar is (stands for) Mount Sinai in Arabia and she corresponds to and belongs in the same category with the present Jerusalem, for she is in bondage together with her children.
When Israel dwelt there, Reuben [his eldest son] went and lay with Bilhah his father's concubine; and Israel heard about it. Now Jacob's sons were twelve.
So Esau went to Ishmael and took to be his wife, [in addition] to the wives he [already] had, Mahalath daughter of Ishmael, Abraham's son, the sister of Nebaioth.
But to the sons of his concubines [Hagar and Keturah] Abraham gave gifts, and while he was still living he sent them to the east country, away from Isaac his son [of promise].
And he had intercourse with Hagar, and she became pregnant; and when she saw that she was with child, she looked with contempt upon her mistress and despised her.