A.T. Robertson Commentary Hebrews 11:21

"By faith Jacob, when he was dying, blessed each of the sons of Joseph; and worshipped, [leaning] upon the top of his staff." — Hebrews 11:21 (ASV)

Leaning upon the top of his staff (επ το ακρον της ραβδου αυτου). From Ge 47:31, but no word for "leaning." The quotation is from the LXX, the Hebrew having "the head of the bed," but the Hebrew word allows either meaning with different vowel points.