Genesis 16:3

So Abram departed, as the Lord had spoken unto him; and Lot went with him: and Abram was seventy and five years old when he departed out of Haran. And Abram took Sarai his wife, and Lot his brother’s son, and all their substance that they had gathered, and the souls that they had gotten in Haran; and they went forth to go into the land of Canaan; and into the land of Canaan they came.

And Sarai said unto Abram, My wrong be upon thee: I have given my maid into thy bosom; and when she saw that she had conceived, I was despised in her eyes: the Lord judge between me and thee.

And he had seven hundred wives, princesses, and three hundred concubines: and his wives turned away his heart.

And David took him more concubines and wives out of Jerusalem, after he was come from Hebron: and there were yet sons and daughters born to David.

For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.

But unto the sons of the concubines, which Abraham had, Abraham gave gifts, and sent them away from Isaac his son, while he yet lived, eastward, unto the east country.

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.

And she gave him Bilhah her handmaid to wife: and Jacob went in unto her.

When Leah saw that she had left bearing, she took Zilpah her maid, and gave her Jacob to wife.

And he rose up that night, and took his two wives, and his two womenservants, and his eleven sons, and passed over the ford Jabbok.

And it came to pass, when Israel dwelt in that land, that Reuben went and lay with Bilhah his father’s concubine: and Israel heard it. Now the sons of Jacob were twelve:

And it came to pass in those days, when there was no king in Israel, that there was a certain Levite sojourning on the side of mount Ephraim, who took to him a concubine out of Beth–lehem–judah. And his concubine played the whore against him, and went away from him unto her father’s house to Beth–lehem–judah, and was there four whole months. And her husband arose, and went after her, to speak friendly unto her, and to bring her again, having his servant with him, and a couple of asses: and she brought him into her father’s house: and when the father of the damsel saw him, he rejoiced to meet him. And his father in law, the damsel’s father, retained him; and he abode with him three days: so they did eat and drink, and lodged there.