Genesis 30:7-9

Amplified Bible, Classic Edition

⁷ And Bilhah, Rachel’s maid, conceived again and bore Jacob a second son.

⁸ And Rachel said, With mighty wrestlings [in prayer to God] I have struggled with my sister and have prevailed; so she named him [this second son Bilhah bore] Naphtali [struggled].

⁹ When Leah saw that she had ceased to bear, she gave Zilpah her maid to Jacob as a [secondary] wife.