LXX Gen 48:14

ἐκτείνας δὲ Ἰσραὴλ τὴν χεῖρα τὴν δεξιὰν ἐπέβαλεν ἐπὶ τὴν κεφαλὴν Ἐφράιμ, οὗτος δὲ ἦν ὁ νεωτερος, καὶ τὴν ἀριστερὰν ἐπὶ τὴν κεφαλὴν Μανασσή, ἐναλλὰξ τὰς χεῖρας.

But Israel stretched out his right hand and put it on the head of Ephraim, the younger; and crossing his hands, he put his left on Manasseh’s head, although Manasseh was the firstborn.