So after Abram had been living in Canaan ten years, Sarai his wife took her Egyptian slave Hagar and gave her to her husband to be his wife.
Abram was eighty-six years old when Hagar bore him Ishmael.
He slept with Hagar, and she conceived. When she knew she was pregnant, she began to despise her mistress.
Then Sarai said to Abram, “You are responsible for the wrong I am suffering. I put my slave in your arms, and now that she knows she is pregnant, she despises me. May the Lord judge between you and me.”
While he was living in the Desert of Paran, his mother got a wife for him from Egypt.
But while he was still living, he gave gifts to the sons of his concubines and sent them away from his son Isaac to the land of the east.
so he went to Ishmael and married Mahalath, the sister of Nebaioth and daughter of Ishmael son of Abraham, in addition to the wives he already had.
So she gave him her servant Bilhah as a wife. Jacob slept with her,
When Leah saw that she had stopped having children, she took her servant Zilpah and gave her to Jacob as a wife.
That night Jacob got up and took his two wives, his two female servants and his eleven sons and crossed the ford of the Jabbok.
While Israel was living in that region, Reuben went in and slept with his father’s concubine Bilhah, and Israel heard of it. Jacob had twelve sons:
After he left Hebron, David took more concubines and wives in Jerusalem, and more sons and daughters were born to him.
He had seven hundred wives of royal birth and three hundred concubines, and his wives led him astray.
Now Hagar stands for Mount Sinai in Arabia and corresponds to the present city of Jerusalem, because she is in slavery with her children.