Lamentations 2:13 - Ellicott's Commentary On The Whole Bible

What thing shall I take to witness... — Practically the question is the same as that which follows, and implies that there was no parallel to the sufferings of Zion in the history of the past. Had there been, and had it been surmounted, it might have been cited in evidence, and some consolation might have been derived from it. As it was there was no such parallel, no such witness. Her “breach,” i.e., her ruin, was illimitable as the ocean, and therefore irremediable.