Jamieson, Fausset and Brown on 2 Kings 9:11

11. Is all well? &c.--Jehu's attendants knew that the stranger belonged to the order of the prophets by his garb, gestures, and form of address; and soldiers such as they very readily concluded such persons to be crackbrained, not only from the sordid negligence of their personal appearance and their open contempt of the world, but from the religious pursuits in which their whole lives were spent, and the grotesque actions which they frequently performed (compare Jr 29:26).