What thing shall I take to witness for thee? rather, What shall I testify unto thee? The nature, of the testifying may be gathered from the following words. It would be a comfort to Zion to know that her misfortune was not unparalleled: solamen miseris socios habuisse malorum.
The expression is odd, however, and, comparing Isaiah 40:18, A. Krochmal has suggested, What shall I compare? The correction is easy. Equal; i.e. compare (comp.