eventide ... before morning - fulfilled to the letter in the destruction “before morning” of the vast host that “at eveningtide” was such a terror (“trouble”) to Judah; on the phrase see Psa 90:6; Psa 30:5.
he is not - namely, the enemy.
us - the Jews. A general declaration of the doom that awaits the foes of God’s people (Isa 54:17).