Genesis 30:11 (KJV)

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.

And Bilhah Rachel's maid conceived again, and bare Jacob a second son.

And Rachel said, With great wrestlings have I wrestled with my sister, and I have prevailed: and she called his name Naphtali.

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

And Zilpah Leah's maid bare Jacob a son.

And Zilpah Leah's maid bare Jacob a second son.

And Leah said, Happy am I, for the daughters will call me blessed: and she called his name Asher.

And Reuben went in the days of wheat harvest, and found mandrakes in the field, and brought them unto his mother Leah. Then Rachel said to Leah, Give me, I pray thee, of thy son's mandrakes.

And she said unto her, Is it a small matter that thou hast taken my husband? and wouldest thou take away my son's mandrakes also? And Rachel said, Therefore he shall lie with thee to night for thy son's mandrakes.

And Jacob came out of the field in the evening, and Leah went out to meet him, and said, Thou must come in unto me; for surely I have hired thee with my son's mandrakes. And he lay with her that night.