Numbers 20:8

8.Take the rod. It is unquestionable that the faith of Moses had now begun to waver; but we gather from his prompt obedience that it had not altogether failed; for he wastes no time in discussion, but comes straight to the rock in order that he may perform God’s command. His faith, then, was only so smothered, that its hidden rigor at once directed him to his duty. Thus is it that the saints sometimes, whilst they totter like children, still advance toward their mark.

By the sight of “the rod,” God would recall both to Moses and the people so many miracles, which were well fitted to awaken confidence for the future; just as if He were uplifting the standard of His power. The command to speak to the rock is not unattended with a severe reproach, as if He had said, that in the lifeless elements there was more reason and intelligence than in men themselves. And assuredly it was a thing much to be ashamed of, that the rock, as if it could hear and was endued with sense, should obey God’s voice, whilst the people, to whom the Law had been given, remained in deafness and stupidity.