Gen 48:12-13
Joseph then, in order to prepare his sons for the reception of the blessing, brought them from between the knees of Israel, who was sitting with the youths between his knees and embracing them, and having prostrated himself with his face to the earth, he came up to his father again, with Ephraim the younger on his right hand, and Manasseh the elder on the left, so that Ephraim stood at Jacob’s right hand, and Manasseh at his left.