Genesis 30
3 Ref And she said, Behold, my maid Bilhah, go in unto her; that she may bear upon my knees, and I also may obtain children by her.
4 Ref And she gave him Bilhah her handmaid to wife: and Jacob went in unto her.
5 And Bilhah conceived, and bare Jacob a son.
6 Ref And Rachel said, God hath judged me, and hath also heard my voice, and hath given me a son: therefore called she his name Dan.