Albert Barnes Commentary Lamentations 2:16

"All thine enemies have opened their mouth wide against thee; They hiss and gnash the teeth; they say, We have swallowed her up; Certainly this is the day that we looked for; we have found, we have seen it." — Lamentations 2:16 (ASV)

Seen it - Omit “it.” The intensity of the enemy’s exultation is shown by the heaping up of unconnected words. We have found what we sought, have seen what we looked for.