Adam Clarke on Amos 8:11

A famine in the land - The most grievous of all famines, a famine of the words of Jehovah; a time in which no prophet should appear, no spiritual counsellor, no faithful reprover, none any longer who would point out the way of salvation, or would assure them of the mercy of God on their repentance and return to him. This is the severest of God's judgments on this side the worm that never dieth, and the fire that is never quenched.