15. devour--the flesh of their foes.
      drink--the blood of their foes; that is, utterly destroy them. Image (as Jer 46:10) from a sacrifice, wherein part of the flesh was eaten, and the blood poured in libation (compare Isa 63:1, &c.).
      subdue with sling-stones--or, "tread under foot the sling-stones" hurled by the foe at them; that is, will contemptuously trample on the hostile missiles which shall fall harmless under their feet (compare Job 41:28). Probably, too, it is implied that their foes are as impotent as the common stones used in slinging when they have fallen under foot: in contrast to the people of God (Zec 9:16), "the (precious) stones of a crown" (compare 1Sa 25:29) [MAURER]. English Version is good sense: The Jews shall subdue the foe at the first onset, with the mere slingers who stood in front of the line of battle and began the engagement. Though armed with but sling-stones, like David against Goliath, they shall subdue the foe (Jud 20:16; 1Ch 12:2) [GROTIUS].
      noise--the battle shout.
      through wine-- (Zec 10:7). The Spirit of God fills them with triumph (Eph 5:18).
      filled--with blood.
      like bowls--the bowls used to receive the blood of the sacrifices.
      as . . . corners--or "horns" of the altar, which used to be sprinkled with blood from the bowls (Ex 29:12; Le 4:18).

JFB.