Walk through Amos, verse by verse, with the great Bible Commentaries of Matthew Henry (1662 - 1714) & Adam Clarke (1760 - 1832)
9:1
I saw the Lord standing upon the altar: and he said, Smite the lintel of the door, that the posts may shake: and cut them in the head, all of them; and I will slay the last of them with the sword: he that fleeth of them shall not flee away, and he that escapeth of them shall not be delivered. KJV
{I saw the Lord standing on the altar, and he said, Smite thou the hinge(s), and the over-thresholds, either lintels, be moved (al)together; for avarice is in the head of all, and I shall slay by sword the last of them; there shall no flight be to them, and he that shall flee of them, shall not be saved.} Wycliffe's Bible
We have here the justice of God passing sentence upon a provoking people; and observe, I. With
what solemnity the sentence is passed. The prophet saw in vision the Lord standing upon the altar, the altar of burnt-offerings; for the Lord has a sacrifice, and multitudes must fall as victims to his justice. He is removed from the mercy-seat between the cherubim, and stands upon the altar, the judgment-seat, on which the fire of God used to fall, to devour the sacrifices. He stands upon the altar, to show that the ground of his controversy with this people was their profanation of his holy things; here he stands to avenge the quarrel of his altar, as also to signify that the sin of the house of Israel, like that of the house of Eli, shall not be purged with sacrifice nor offering for ever. He stands on the altar, to prohibit sacrifice. Now the order given is, Smite the lintel of the door of the temple, the chapiter, smite it with such a blow that the posts may shake, and cut them, wound them in the head, all of them; break down the doors of God’s house, or of the courts of his house, in token of this, that he is going out from it, and forsaking it, and then all judgments are breaking in upon it. Or it signifies the destruction of those in the first place that should be as the door-posts to the nation for its defence, so that, they being broken down, it becomes as a city without gates and bars. "Smite the king, who is as the lintel of the door, that the princes, who are as the posts, may shake; cut them in the head, cleave them down, all of them, as wood for the fire; and I will slay the last of them, the posterity of them, them and their families, or the least of them, them and all that are employed under them; or, I will slay them all, them and all that remain of them, till it comes to the last man; the slaughter shall be general.’’ There is no living for those on whom God has said, I will slay them, no standing before his sword. II. What effectual care is taken that none shall escape the execution of this sentence.