Genesis 30:3-5

Darby Translation

³ And she said, Behold, there is my maid, Bilhah: go in to her, in order that she may bear on my knees, and I may also be built up by her.

⁴ And she gave him Bilhah her maidservant as wife, and Jacob went in to her.

⁵ And Bilhah conceived, and bore Jacob a son.