Surely the Lord God will do - For the Lord God "doeth"
Nothing, but He revealeth His secret unto His servants the prophets - So our Lord saith, "And now I have told you before it come to pass, that, when it is come to pass, ye may believe" (John 14:29; compare John 13:19). While it is yet a "secret" counsel within Himself, He admitteth to it His servants the prophets. The same word signifies "secret" and "secret counsel with a friend." So , "God revealed to Noah that tie would bring the deluge, and to Abraham and Lot, that He would destroy the cities of the plain, and to Joseph the 7 years' famine in Egypt, and to Moses its plagues, and to Moses and Joshua all the chastisements of His people, and to Jonah the destruction of Nineveh, that they who heard of the coming punishment, might eithcr avoid it by repentance, or, if they should despise it, might be more justly punished. And so now the Lord is about to reveal through Amos, His servant and prophet, what He willeth to do to the 10 tribes, that forsaking their idols and turning to Him, they might be freed from the impending peril; which is of the great mercy of God. He foretelleth evil to come, that He may not be compelled to inflict it. For He who forewarneth, willeth not to punish sinners."
Lap.: "So He inflicted not on Egypt any plagues by the hand of Moses, but He first forewarned Pharaoh and the Egyptians by him; nor the sufferings by the Ammonites, Midianites and Philistines, related in the Book of Judges, but He foremonished Israel by Joshua Joshua 23:12-16; Joshua 24:19-20; nor did He inflict on the Jews that destruction by Titus and the Romans, but He foremonished them by Christ Luke 19:42-44 and the Apostles. So neither will He bring that last destruction on the world, without having first sent the prophets and Angels, who, sounding with the seven trumpets, shall proclaim it throughout the world" Revelation 8:2.

Surely the Lord God will do nothing - In reference to the punishment, correction, or blessing of his people: -
But he revealeth his secret unto his servants the prophets - They are in strict correspondence with him, and he shows them things to come. Such secrets of God are revealed to them, that they may inform the people; that, by repentance and conversion, they may avoid the evil, and, by walking closely with God, secure the continuance of his favor.

Surely the Lord GOD will do nothing, but he (h) revealeth his secret unto his servants the prophets.
(h) God does not deal with the Israelites as he does with other people: for he always warns them before of his plagues by his Prophets.

Surely the Lord God will do nothing,.... In the world, in a nation or city; no remarkable event has happened, or shall happen, to the sons of men:
but he revealeth his secret unto his servants the prophets; what he willed and determined to do, which was a secret in his own breast, till revealed; and this generally, and for the most part, he makes known to those that fear and serve him; and especially to whom he employs in public service, as his prophets and ministers, previous to his accomplishment of it: thus he revealed to Noah the drowning of the old world by the flood; to Abraham the burning of Sodom and Gomorrah; and to the same servant and friend of his the affliction of his posterity four hundred years in a strange land, and then to be brought out with great substance; to Abijah the Shilonite the rending of ten tribes from the house of David; to Jeremiah the seventy years' captivity of the Jews in Babylon; to Isaiah their deliverance from thence, through Cyrus by name; to Daniel the four monarchies, the nature, rise, and fall of them; and to John, the disciple of Christ, all the material things that should come to pass, relating to the church and world, from the first times of the Gospel to the second coming of Christ; which that book is a revelation of that bears that name; see Genesis 18:17; and so that grand affair, which God has brought about in the world, the salvation of his people by his Son, which was a secret hid in his heart before the world began, this he revealed to his servants before it was effected; not only the scheme of it, but the author of it, whom he very early gave notice of; and who was spoken of by the mouth of all the prophets, from the beginning of the world; declaring who and what he was, the Son of God; that he should be incarnate, and born of a virgin; when he should appear, and where, and in what part of the world; also in what way and manner he should obtain salvation, by his obedience and sufferings; and all the circumstances relating thereunto are most minutely and exactly declared by him. Yea, God reveals unto his saints in common the secret of his purposes, respecting their election, redemption, and regeneration, which is made known in the effectual calling; and of the blessings of his grace in the covenant, and also of his providences; and of his love, grace, and mercy; and of his Gospel, and the mysteries of it; thus he deals with them as his friends, rather than as his servants; see Psalm 25:14.

his secret--namely, His purpose hidden from all, until it is revealed to His prophets (compare Genesis 18:17). In a wider sense, God's will is revealed to all who love God, which it is not to the world (Psalm 25:14; John 15:15; John 17:25-26).
unto his servants--who being servants cannot but obey their Lord in setting forth His purpose (namely, that of judgment against Israel) (Jeremiah 20:9; Ezekiel 9:11). Therefore the fault which the ungodly find with them is groundless (1-Kings 18:17). It aggravates Israel's sin, that God is not about to inflict judgment, without having fully warned the people, if haply they might repent.

Will do nothing - Usually the Lord doth no great thing for or against his people, without giving warning of it before it comes.