129:5-8 While God's people shall flourish as the loaded palm-tree, or the green and fruitful olive, their enemies shall wither as the grass upon the house-tops, which in eastern countries are flat, and what grows there never ripens; so it is with the designs of God's enemies. No wise man will pray the Lord to bless these mowers or reapers. And when we remember how Jesus arose and reigns; how his people have been supported, like the burning but unconsumed bush, we shall not fear.

5, 6. The ill-rooted roof grass, which withers before it grows up and procures for those gathering it no harvest blessing (Ru 2:4), sets forth the utter uselessness and the rejection of the wicked.