Genesis 30:3-5

New Revised Standard Version, Anglicised

³ Then she said, ‘Here is my maid Bilhah; go in to her, that she may bear upon my knees and that I too may have children through her.’ ⁴ So she gave him her maid Bilhah as a wife; and Jacob went in to her. ⁵ And Bilhah conceived and bore Jacob a son.