Jacob’s cross-shaped blessing of his grandsons. Joseph brought his sons and placed each one directly opposite the corresponding hand of his father, but Jacob crossed his hands, laying them the other way round:
“And Joseph took them both, Ephraim with his right hand toward Israel’s left hand, and Manasseh with his left hand toward Israel’s right hand, and brought them near him. Then Israel stretched out his right hand and laid it on Ephraim’s head, who was the younger, and his left hand on Manasseh’s head, guiding his hands knowingly, for Manasseh was the firstborn” (Gen. 48:13-14)