Talmud su Amos 1:9

Our ancestors tested the Holy Blessed One ten different times, but they were punished only for the sin of slander ([which was one of them]). These are the ten: Once at the sea, once when the manna was first given, once when the manna stopped coming down, once at the first appearance of quails, once at the latter appearance of quails, once at Marah, once at Refidim, once at Horev, once [at the Calf, and once] with the spies. And the sin of the spies was the worst of them all, as it says (Numbers 14:22), “They have tested Me these ten times, and have not heeded My voice.” And also (Numbers 14:37), “The men died before God by plague, for spreading bad reports about the Land [of Israel].” And from this we can reason that if the Holy Blessed One punished the spies for insulting the land, which has no mouth to speak, no reaction, and no shame, then all the more so would the Holy Blessed One punish someone who speaks ill of his friend and shames him.
Rabbi Shimon would say: Afflictions come upon those who speak slander. For so we find with Aaron and Miriam, who spoke slanderously about Moses, and punishments came upon them – as it says (Numbers 12:1), “Miriam and Aaron spoke against Moses.” And why does the verse place Miriam before Aaron? [This teaches us that Tziporah (the wife of Moses)] went and talked to Miriam, and then Miriam went and told everything to Aaron, and then the two of them began to speak against this righteous man. And because these two spoke against a righteous man, punishments came upon them, as it says (Numbers 12:9), “And the Eternal became angry with them, and departed.” What do we learn from “and departed”? This teaches us that God departed from Aaron and attached to Miriam, because Aaron was not as engaged as Miriam in spreading slanderous words around, so she was (immediately) punished more. Miriam said: Prophecy has come to me even though I have not separated from my husband. And Aaron said: Prophecy has come to me even though I have not separated from my wife. And even our earliest ancestors received prophecy even though they did not separate from their wives. But Moses, because he is so arrogant, separated from his wife. They did not take this up with [Moses] directly, nor did they know for certain that it was true. It was not at all clear that he was being arrogant. We can reason from this that if Miriam, who spoke against her brother only secretly, was still punished, then if one speaks against his friend publicly, and shames him, all the more so will he be punished.
At that time, Aaron said to Moses: Moses, my brother, you think that this skin disease affects only Miriam, but it is also upon the flesh of our father Amram. I will give you a parable to tell you what this is like: Like someone who has a hot coal placed in his hand. Even if he tosses it around from place to place, his flesh is still burned.”¹The idea here is that Amram and Miriam, father and daughter, are of one flesh, and therefore, if one of them is affected, so is the other. This is why it says (Numbers 12:12), “Please, do not let her be like one who is dead [when she emerges from her mother’s womb, with half of her flesh eaten away].” Meanwhile, Aaron attempted to pacify Moses by saying: Moses, my brother, have we ever done harm to anyone in the world? He replied: No. Aaron continued: So if we have done no harm to anyone in the world, would we have wished to harm you, who are our brother? Now what can I do? Will this mistake come between the covenant between us? (For he had established a covenant with Aaron and his sons,) as it says (Amos 1:9), “They did not remember the covenant of brotherhood.” At that moment, Moses drew a small circle on the ground and stood inside it, and asked for mercy for Miriam. He said: I will not leave this spot until my sister Miriam is healed, as it says (Numbers 12:13), “Please, God, heal her.” Then the Holy Blessed One said to Moses: If a king had reprimanded her, or if her father had reprimanded her, it would have been appropriate for her to sit in shame for seven days. And since it is I, the King of all kings, all the more so is it just for her to sit in shame for fourteen days! However, for your sake, I will forgive her, as it says (Numbers 12:14), “The Eternal said to Moses: If her father spat in her face [would she not sit in shame for seven days?]”
“Now Moses was a very humble man” (Numbers 12:3). Could it be that he was meek and not beautiful and praiseworthy? But we learn from the verse (Exodus 40:19), “He spread the tent over the Tabernacle”: That just as the Tabernacle was ten cubits high, so was Moses also ten cubits high. Could it be that he was as humble as the angels, who serve God? But we learn from that [same] verse [that Moses was humble] “more than any other person”; more than other people, that is, but not more than the angels who serve God. Could it be that he was humbler than those in previous generations? But we learn from that [same] verse, “on the face of the earth”; in his own generation, that is, and not previous generations. There are three types of skin-afflicted people in the world: moist, dry, and polypous, and Moses made himself lowlier than them all.