Gen 48:14

וַיִּשְׁלַח֩ יִשְׂרָאֵ֨ל אֶת־יְמִינ֜וֹ וַיָּ֨שֶׁת עַל־רֹ֤אשׁ אֶפְרַ֨יִם֙ וְה֣וּא הַצָּעִ֔יר וְאֶת־שְׂמֹאל֖וֹ עַל־רֹ֣אשׁ מְנַשֶּׁ֑ה שִׂכֵּל֙ אֶת־יָדָ֔יו כִּ֥י מְנַשֶּׁ֖ה הַבְּכֽוֹר׃

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.