Thus says the Lord GOD; In the day when it went down to the grave I caused a mourning: I covered the deep for it, and I restrained its floods, and the great waters were held back: and I caused Lebanon to mourn for it, and all the trees of the field fainted because of it.
Read Chapter 31
George Leo Haydock
Waters, as if they bewailed his fate. (Calmet)
Those whom the king of Ninive had exalted, and the people, who wished not to submit to a foreigner, would no doubt lament the slaughtered monarch, now silent (Haydock) in the grave. (Theodoret)