Kabbalah su II Samuele 23:21

What is written next? "And he slew the Egyptian, a man of good appearance" (II Samuel 23:21). Here the secret of the verse is revealed to let us know that every time Yisrael sinned, he went away and prevented them from receiving all the blessings and all the lights that shone upon them. "He slew the Egyptian." This is the light, the same Light that shone upon Yisrael. And who is he? Moses. As he is described in the verse, "And they said an Egyptian man delivered us" (Ex. 2:19). Because he was born and grew up (in Egypt) until he rose to reach the Supernal Light.

"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."

Immediately, "he went down to him with a staff" (II Samuel 23:21), (which is) harsh Judgment, "and plucked the spear out of the hand of the Egyptian" (Ibid.). From that moment onward, he lost the rod and could never regain it. "And slew him with his own spear" (Ibid.) - because of the sin of smiting with the rod, he died and did not enter the Holy Land, thereby causing this light to be withheld from Yisrael.