Howl, ye shepherds, and cry; and wallow yourselves in the ashes, ye principal of the flock: for the days of your slaughter and of your dispersions are accomplished; and ye shall fall like a pleasant vessel. Howl, ye shepherds - Ye kings and chiefs of the people.
Ye shall fall like a pleasant tresses - As a fall will break and utterly ruin a precious vessel of crystal, agate, etc., so your overthrow will be to you irreparable ruin.