Deuteronomy 33:13-15

And of Joseph Including both Ephraim and Manasseh. In Jacob's blessing, that of Joseph 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. By the sun Which opens and warms the earth, cherishes and improves, and in due time ripens, the seeds and fruits of it. The moon Which by its moisture refreshes and promotes them. Hebrew, Of the moons, or months, that is, which it bringeth forth in the several mouths or seasons of the year. The chief things That is, the excellent fruits, growing upon the mountains, as grapes, olives, figs, &c., or the precious minerals, contained in them; ancient and lasting That is, such as have been from the beginning of the world, and are likely to continue till the end of it, in opposition to those hills or mounts which have been cast up by man.