Adam Clarke's Bible Commentary 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 ql shalak, it is unsheathed; i.e., before it ears, or comes to seed.
Matthew Henry Commentary
Verses 5-8 - While God's people shall flourish as the loaded palm-tree, or the gree and fruitful olive, their enemies shall wither as the grass upon the house-tops, which in eastern countries are flat, and what grows ther never ripens; so it is with the designs of God's enemies. No wise ma will pray the Lord to bless these mowers or reapers. And when we remember how Jesus arose and reigns; how his people have bee supported, like the burning but unconsumed bush, we shall not fear _________________________________________________
Original Hebrew יהיו1961 כחציר2682 גגות1406 שׁקדמת6927 שׁלף8025 יבשׁ׃3001