Musar for Berakhot 63:9
אמרי דבי ר' ינאי אין ארי נוהם מתוך קופה של תבן אלא מתוך קופה של בשר
The school of R. Jannai said, "A lion growls not in a den full of straw but in a den full of meat."
Mesilat Yesharim
Therefore the pious deemed it good for a man to afflict himself sometimes, in order to put down the evil inclination of arrogance, which grows strong only through abundance, similar to what our sages, of blessed memory, said: "a lion does not roar over a basket of straw but over a basket of meat" (Berachot 32a).
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