Ezekiel 31:15 - Joseph Benson’s Commentary on the Old and New Testaments

In the day when he went down to the grave This, and the following verses, are an elegant description of that consternation that seized the king of Assyria's allies, at the suddenness of his downfall; the same metaphor being still pursued. I caused a mourning: I covered the deep for him The deep, that is said to have raised up this fair tree, Ezekiel 31:4, is now described as mourning at his downfall. I restrained the floods, and the great waters were stayed As if the streams had stopped their usual course on purpose to lament his fate. The meaning seems to be, that the great nations and numerous people under his dominions, or his confederates and allies, were all struck with astonishment at his fall. I caused Lebanon to mourn for him By Lebanon is probably signified Syria, which was in alliance with the king of Assyria. All the trees of the field fainted for him All the neighbouring princes lamented his ruin, and were disheartened at having lost their protector.