John Wesley on Deuteronomy 33:13

And of Joseph - Including both Ephraim and Manasseh. In Jacob's blessing that of Joseph's is the largest. And so it is here. His land - His portion shall be endowed with choice blessings from God. Of heaven - That is, the precious fruits of the earth brought forth by the influences of heaven, the warmth of the sun, and the rain which God will send from heaven. The deep - The springs of water bubbling out of the earth: perhaps it may likewise refer to the great deep, the abyss of waters, which is supposed to be contained in the earth.