Rashi on Genesis 48:12/רש"י על בראשית מ״ח:י״ב

1ויוצא יוסף אתם AND JOSEPH BROUGHT THEM OUT — After he (Jacob) had kissed them, Joseph brought them out from between his knees in order to place them one at the right and the other on the left in order that Jacob might thus lay his hands upon them and bless them

2וישתחו לאפיו AND HE PROSTRATED HIMSELF BEFORE HIS FACE — after he had stepped backwards from before his father.