To wit, the poor man last mentioned. Within their walls; either,
1. Within their own walls, i.e. in private and secret places, for fear of the oppressors. Or rather,
2. Within the walls of the rich oppressors, for their use and benefit; for the poor, alas! had no walls, nor houses, nor oliveyards, nor vineyards left to them, but they were violently spoiled of and driven away from all those things, as was said in the foregoing verses. Their wine-presses, i.e. the grapes in their wine-presses, by a metonymy of the thing containing for the thing contained. Suffer thirst; because they are not permitted to quench their thirst out of the wine which they make, though their labor's both need and deserve refreshment.