A picture of quick failure

Psalm 129 is a communal song that looks back on long-standing hostility against Israel and insists that the attackers have not finally won (see Psalm 129:1–2). The psalm moves from remembering repeated affliction (vv. 1–3), to confidence that the Lord has cut short the power of the oppressors (vv. 4–5), to a closing set of wishes about the opponents’ end (vv. 6–8). Verses 6–7 sit inside that ending. Instead of arguing, the psalm paints a picture: apparent growth that never becomes a harvest.

The rooftop-grass image fits everyday life in the ancient Levant, where homes often had flat roofs with packed earth or dust; small plants could sprout there briefly after rain but lacked deep soil and steady moisture. Harvest language in v. 7 assumes an agricultural setting where valuable growth becomes something a worker can grasp, cut, and bundle for use. The psalm does not name a specific crisis in these verses, but it draws on familiar scenes from ordinary labor to describe an enemy’s collapse: visible at first, then quickly dried up and useless.

Shared ground

Psalm 129:6–7 extends the psalm’s closing wishes about the end of Israel’s opponents. The speaker asks that “they” be like grass that springs up on a flat roof but dries out before it reaches full growth (explicit claim). The point is not that it never appears, but that it fails quickly and never becomes useful.

The harvest images explain the metaphor: because the rooftop grass withers early, a reaper cannot even gather a handful from it, and a binder cannot collect an armful for bundling (explicit claims). In plain terms, the opponents’ efforts are pictured as unproductive—visible for a moment, then gone, leaving nothing to show.

Where interpretation differs

Two main questions get handled differently:

1. Who “they” are. Some read “they” as the specific enemies attacking Israel in the earlier lines of Psalm 129 (the most direct link). Others read “they” more generally as anyone who sets themselves against God’s people, using the psalm as a broader pattern.

2. What “before it grows up” stresses most. Some take it mainly as a timing idea (it dies quickly). Others emphasize incomplete maturity (it never becomes fully developed or usable). Both fit the rooftop-grass picture.

Why the disagreement exists The psalm does not re-identify the opponents in verses 6–7, so readers reach back to earlier lines to fill in “they.” Also, the rooftop-grass image naturally carries more than one closely related nuance: quick drying implies both short duration and failure to mature.

What this passage clearly contributes These verses contribute a concrete picture of “quick failure”: opposition may show signs of life and momentum, but it can end before producing any lasting result. The harvest language underlines the outcome: no yield, no gathering, no finished product—efforts that never become something a worker can take in hand.