6. Samaria's punishment is mentioned first, as it was to fall before Jerusalem.
      as an heap of the field-- (Mic 3:12). Such a heap of stones and rubbish as is gathered out of fields, to clear them (Ho 12:11). Palestine is of a soil abounding in stones, which are gathered out before the vines are planted (Isa 5:2).
      as plantings of a vineyard--as a place where vines are planted. Vineyards were cultivated on the sides of hills exposed to the sun. The hill on which Samaria was built by Omri, had been, doubtless, planted with vines originally; now it is to be reduced again to its original state (1Ki 16:24).
      pour down--dash down the stones of the city into the valley beneath. A graphic picture of the present appearance of the ruins, which is as though "the buildings of the ancient city had been thrown down from the brow of the hill" [Scottish Mission of Inquiry, pp. 293,294].
      discover the foundations--destroy it so utterly as to lay bare its foundations (Eze 13:14). Samaria was destroyed by Shalmaneser.

JFB.