12. The Lord spake unto Moses and Aaron, Because ye believed me not, &c.--The act of Moses in smiting twice betrayed a doubt, not of the power, but of the will of God to gratify such a rebellious people, and his exclamation seems to have emanated from a spirit of incredulity akin to Sarai's (Ge 18:13). These circumstances indicate the influence of unbelief, and there might have been others unrecorded which led to so severe a chastisement.

JFB.