Charles Spurgeon Commentary Amos 7:1-3

"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. And it came to pass that, when they made an end of eating the grass of the land, then I said, O Lord Jehovah, forgive, I beseech thee: how shall Jacob stand? for he is small. Jehovah repented concerning this: It shall not be, saith Jehovah." — Amos 7:1-3 (ASV)

In a vision, the prophet saw the locusts or grasshoppers come to devour all the green things of the land — a very terrible visitation.

If you have never seen it, you cannot realize how utterly bare everything is made after the visit of the locusts. The prophet put up a vehement and earnest prayer; he cried, "O Lord God, forgive," and no sooner was the intercession offered than the Lord said, "It shall not be." Thus the impending judgment was turned away.