Genesis 46:20
Manasseh and Ephraim were born to Joseph in the land of Egypt by Asenath daughter of Potiphera, priest of On.
What it says
Joseph's sons Manasseh and Ephraim were born in Egypt to Asenath, daughter of Potiphera, priest of On.
What it is doing
It marks Joseph's fruitfulness already established in Egypt.
In context
19The sons of Jacob’s wife Rachel: Joseph and Benjamin. 20Manasseh and Ephraim were born to Joseph in the land of Egypt by Asenath daughter of Potiphera, priest of On. 21The sons of Benjamin: Bela, Becher, Ashbel, Gera, Naaman, Ehi, Rosh, Muppim, Huppim, and Ard. 22These are the sons of Rachel born to Jacob — fourteen in all.