Reference for Bava Batra 49:4

תא שמע דתניא ר"ע אומר לכל רוח הוא עושה ומרחיק חמשים אמה חוץ ממערבה דאינו עושה כל עיקר מפני שהיא תדירא

Said Raba to R. Nahman: A constant abode of what? Shall I say of winds? How can this be, seeing that R. Hanan b. Abba has said in the name of Rab: Four winds blow every day and the north wind with all of them, for without this the world could not endure a moment. The south wind is the most violent, and were it not that the Son of the Hawk<span class="x" onmousemove="('comment',' An angel so called. ');">⁴</span> stays it with his wings it would destroy the world, as it says, Doth the hawk soar by the wisdom, and stretch her wings towards the south?<span class="x" onmousemove="('comment',' Job XXXIX. 26. ');">⁵</span>

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