Kabbalah zu Bamidbar 20:11

"And the Egyptian had a spear in his hand" (2 II Samuel 23:21). This refers to the rod of Elohim that was delivered into his hand. As it is written, "With the rod of Hashem in my hand" (Ex. 17:9). And this is the same rod that was created at the twilight of Shabbat eve and was engraved with the Holy Name by a holy shaping. And with this rod Moses committed the sin of smiting the rock, as is written, "And he smote the rock with his rod twice" (Num. 20:11). The Holy One, blessed be He, said to him: "Moses, I have not given you My rod for this purpose; by your life, from henceforward, it will not be in your hands any more."