Bible Encyclopedias
Gray

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

(some form of the root שִׂיב, sib), applied to the hair as an indication of old age (q.v.), which in the East is universally respected (Proverbs 20:29). (See HAIR).

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