Charles Ellicott Commentary Amos 7:1

"Thus the Lord Jehovah showed me: and, behold, he formed locusts in the beginning of the shooting up of the latter growth; and, lo, it was the latter growth after the king`s mowings." — Amos 7:1 (ASV)

Each of the visions is introduced with closely resembling words. For “grasshopper,” read locusts. The phrase “king’s mowings” suggests that the king tyrannically claimed the first-fruits of the hay harvest, which was ordinarily followed by the early “rain upon the mown grass” (Compare to 1 Kings 18:5).