And Moses lifted up his hand, and with his rod he struck the rock twice: and the water came out abundantly, and the congregation drank, and their animals also.
All Commentaries on Numbers 20:11 Go To Numbers 20
Jerome
AD 420
Priests also must take care lest they be insincere, lest they doubt the power of God. If Aaron and Moses (who seemed to waver at the waters of contradiction) did not deserve to enter the Promised Land, does it not stand to reason that we, bent under the burden of sin, shall be far less able to cross the river Jordan and reach Gilgal, the place of circumcision, if we shall cause one of these little ones to sin? Homily