The name occurs only in Ezekiel 6:14 (the King James Version "Diblath"), and the place has not been identified. If the reading is correct it may possibly be represented by Dibl, a village in Upper Galilee, South of Tibnin. But more likely it is a scribal error for Riblah.
Orr, James, M.A., D.D. General Editor. "Entry for 'DIBLAH'". "International Standard Bible Encyclopedia". 1915.