Reference for Taanit 6:10

לא קשיא הא דאתא ניחא הא דאתא רזיא (ואי בעית אימא) הא דמעלה אבק הא דלא מעלה אבק

Between winds and winds' too there is no contradiction; in the one case they are normal winds and in the other extraordinary winds.<span class="x" onmousemove="('comment',' [Such are withheld. Since, however, they are not particularly beneficial no mention need be made of then,.');">⁶</span> But are not extraordinary winds suitable for<span class="x" onmousemove="('comment',' [R. Gershom reads, 'are necessary'].');">⁷</span> [winnowing] in the barn? - This can be done with sieves [independently of the wind].

Jastrow

Jastrow