Midrash su Deuteronomio 4:41

R. Tanchum b. Chanilai said: "Why is the tribe of Reuben mentioned first among the cities of safety? Because he was the first to save Joseph from his brothers, as it is written (Gen. 37, 21) And when Reuben heard it, he delivered him out of their hand." R. Simlai lectured: "It is written (Deut. 4, 41) Then Moses separated three cities beyond the Jordan, toward the sunrise. The Holy One, praised be He! said to Moses: 'Thou hast caused the sun to shine toward the murderers (to save them from death)'." R. Simlai lectured: "What is the meaning of the verse (Ecc. 5, 9) He that loveth silver shall not be satisfied with silver; nor he that loveth abundance, will finally have income? He that loveth silver refers to Moses, our master, who, [although] having been aware that the three cities on the other side of the Jordan could not protect [the innocent murderer] until the other three cities were selected; nevertheless he selected them, saying: "A meritorious act which has come to my hand, I shall fulfil;' nor he that loveth abundance, i.e., who is fit to lecture before a crowd? He who possesses all the grain [of knowledge] like the Bible, Mishna, Halacha and Hagada." And this is what R. Elazar said: "What is the meaning of the passage (Ps. 106, 2) Who can express the mighty acts of the Lord? or make all His praise to be heard? This means, who is fit to express the mighty acts of the Lord? He who can make all His praise to be heard." The Rabbis, and according to others, Rabba b. Mari explained this passage thus: "He who loves the abundance [of scholars], possesses the fruit of knowledge"; whereupon the Rabbis fixed their eyes upon Raba b. Rabba who possessed such a quality. R. Ashi said: "He who likes to learn among a crowd of scholars possesses the fruit of their knowledge." And this is what R. Jose b. Chanina said: "What is the meaning of the passage (Jer. 50, 36) The sword is upon the boasters (badim) and they shall become fools? This means the sword may cut the necks of the scholars who study separately [without interchange of ideas] and not only this, but they become also foolish; for it is written here, V'no-alu, (and they become foolish) and there is another passage (Num. 12, 11) For that we have done foolishly, and not only this but they also commit a crime, as it is written (Ib.) And wherein we have sinned. Rabina said: "He who loves to study among a crowd [of students], will possess the grain of knowledge." And this is what Rabbi said: "I learned much from my teachers, more, however, from my colleagues, but from my disciples, I learned the most."

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