Genesis 29:29
And Laban gave to Rachel his daughter Bilhah his handmaid to be her maid.
Nave's Topical Index—AKJV

Genesis 30:3,4
And she said, Behold my maid Bilhah, go in to her; and she shall bear on my knees, that I may also have children by her.
Nave's Topical Index—AKJV

Genesis 37:2
These are the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brothers; and the lad was with the sons of Bilhah, and with the sons of Zilpah, his father's wives: and Joseph brought to his father their evil report.
Nave's Topical Index—AKJV