Psalms 129:5-8

Verse 5

Let them all be confounded - They shall be confounded. They who hate Zion, the Church of God, hate God himself; and all such must be dealt with as enemies, and be utterly confounded.
Verse 6

As the grass upon the housetops - As in the east the roofs of the houses were flat, seeds of various kinds falling upon them would naturally vegetate, though in an imperfect way; and, because of the want of proper nourishment, would necessarily dry and wither away. If grass, the mower cannot make hay of it; if corn, the reaper cannot make a sheaf of it. Let the Babylonians be like such herbage - good for nothing, and come to nothing.

Withereth afore it groweth up - Before שלק shalak, it is unsheathed; i.e., before it ears, or comes to seed.
Verse 8

Neither do they which go by say - There is a reference here to the salutations which were given and returned by the reapers in the time of the harvest. We find that it was customary, when the master came to them into the field, to say unto the reapers, The Lord be with you! and for them to answer, The Lord bless thee! Rut 2:4. Let their land become desolate, so that no harvest shall ever more appear in it. No interchange of benedictions between owners and reapers. This has literally taken place: Babylon is utterly destroyed; no harvests grow near the place where it stood.

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