Joseph is a fruitful bough,.... Or as one, like the bough or branch of a tree laden with fruit, as he was with children; one of which he called Ephraim from his fruitfulness, and both his sons became numerous, and the heads of two tribes in Israel; and with other temporal fruits and blessings, as riches, honour, &c.
and especially with the fruits of grace and righteousness:[even] a fruitful bough by a well; those are the most fruitful that are near a well or fountain of water, as such trees are which are planted by rivers of water, see Ps 1:3 this being repeated may have respect to the two boughs or branches of Joseph's family, or the two fruitful and numerous tribes that sprung from him:whose branches run over the wall; as such trees that are set against one, and by the reflected heat of the sun grow the more, and become more fruitful.