Genesis 38:28

38:28 While she was giving birth, one child put out his hand, and the midwife took a scarlet thread and tied it on his hand, saying, “This one came out first.”

Genesis 48:14

48:14 Israel stretched out his right hand and placed it on Ephraim’s head, although he was the younger. Crossing his hands, he put his left hand on Manasseh’s head, for Manasseh was the firstborn.

Genesis 48:17

48:17 When Joseph saw that his father placed his right hand on Ephraim’s head, it displeased him. So he took his father’s hand to move it from Ephraim’s head to Manasseh’s head.