C. F. Keil and Franz Delitzsch on Numbers 20:9-11

Num 20:9-11

Moses then took the rod “from before Jehovah,” - i.e., the rod with which he had performed miracles in Egypt (Exo 17:5), and which was laid up in the sanctuary, not Aaron’s rod which blossomed (Num 17:10), - and collected the congregation together before the rock, and said to them, “Hear, ye rebels, shall we fetch you water out of this rock?” He then smote the rock twice with his rod, whereupon much water came out, so that the congregation and their cattle had water to drink.