Augustine of Hippo

[Moses] touched the rock with his rod with doubt and thus distinguished this miracle from the rest, in which he had not doubted. He thus offended, thus deserved to hear that he should die without entering into the land of promise. For being disturbed by the murmurs of an unbelieving people, he did not hold fast that confidence which he ought to have held.

Explanation Of The Psalms 106:26 ↗