Genesis 30:5 DBY

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.

⁶  And Rachel said, God has done me justice, and has also heard my voice, and given me a son; therefore she called his name Dan.

⁷  And Bilhah Rachel's maidservant again conceived, and bore Jacob a second son.