Amos 1:9 - The Popular Commentary by Paul E. Kretzmann

Thus saith the Lord, the individual announcements coming with a special reference to the inspired nature of their contents, For three transgressions of Tyre, the great metropolis and seaport of Phoenicia, Cf Isaiah 23, and for four, I will not turn away the punishment thereof, refusing to change the punishment which He had decided upon, because they delivered up the whole captivity, all the captives obtained from the Philistines or the Syrians as the result of one of their campaigns, to Edom and remembered not the brotherly covenant, both David and Solomon having been allied with Phoenicia by a special treaty;