13. the line of Samaria, and the plummet of the house of Ahab—Captives doomed to destruction were sometimes grouped together and marked off by means of a measuring-line and plummet (2Sa 8:2; Isa 34:11; Am 7:7); so that the line of Samaria means the line drawn for the destruction of Samaria; the plummet of the house of Ahab, for exterminating his apostate family; and the import of the threatening declaration here is that Judah would be utterly destroyed, as Samaria and the dynasty of Ahab had been.

     8. stretched . . . a line—The Easterns used a measuring-line not merely in building, but in destroying edifices (2Ki 21:13; Isa 34:11); implying here the unsparing rigidness with which He would exact punishment.

     Teth.

     7. wall made by a plumb-line—namely, perpendicular.

     8. plumb-line in . . . midst of . . . Israel—No longer are the symbols, as in the former two, stated generally; this one is expressly applied to Israel. God's long-suffering is worn out by Israel's perversity: so Amos ceases to intercede (compare Ge 18:33). The plummet line was used not only in building, but in destroying houses (2Ki 21:13; Isa 28:17; 34:11; La 2:8). It denotes that God's judgments are measured out by the most exact rules of justice. Here it is placed "in the midst" of Israel, that is, the judgment is not to be confined to an outer part of Israel, as by Tiglath-pileser; it is to reach the very center. This was fulfilled when Shalmaneser, after a three years' siege of Samaria, took it and carried away Israel captive finally to Assyria (2Ki 17:3, 5, 6, 23).

     13. The converse of, "Blessed are the merciful, for they shall obtain mercy" (Mt 5:7). Translate, "The judgment (which is coming on all of us) shall be without mercy to him who hath showed no mercy." It shall be such toward every one as every one shall have been [BENGEL]. "Mercy" here corresponds to "love," Jas 2:8.