Salmi 104:14 Cabala: Zohar

This is the secret of the verse: "Who causes the grass to grow for the cattle" (Tehilim 104:14). This is the living creature that crouches on a thousand mountains and for whom grass is grown every day. This grass refers to those angels who govern only for a specific time, but then must vanish immediately; because they were created on the second day, their dominion draws upon the Left Column that was created on the second day. In their dominion they wish to annul the right. They are destined to be food for this living creature, which means that nothing of their illumination is drawn down to the lower beings. Only the Female principle enjoys it, and then she burns and annuls them with it as there is fire that consumes fire, which is the dominion of the Left, called 'fire.'

When they are made ready by "the service of man," sustenance and food come from them to the world, as it is written: "That he may bring forth food out of the earth" (Idid.). This is what is meant: "herb yielding seed" (Gen. 1:12), which is the secret of the Mochin. The grass (hay) does not yield any seed, but is intended to be consumed by the sacred fire of the Female principle, as explained above, whereas the herb, which yields seed, is intended for the improvement of the world.