Bible Encyclopedias
Mutter

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

(מִהְגַּים, mahgim, mutterers), in Isaiah 8:19, refers to the murmuring or indistinct enunciation of wizards and soothsayers in uttering their spells. (See DIVINATION).

Bibliography Information
McClintock, John. Strong, James. Entry for 'Mutter'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/​encyclopedias/​eng/​tce/​m/mutter.html. Harper & Brothers. New York. 1870.