Reference for Yoma 41:1

ויש אומרים אף רידייא ובעו רבנן רחמי אנשמה בשעה שיוצאה מן הגוף ובטלוה

and some say also the sound of Ridya.<span class="x" onmousemove="('comment',' : name of the angel of rain. In Ta'an. ');">¹</span> The Sages prayed for the soul as it leaves the body and achieved the stopping [of that cry]. We have learnt in accord with R'Shila: If one starts out on a journey before keri'ath ha-geber, his blood comes upon his own head!<span class="x" onmousemove="('comment',' Which proves the phrase to mean, cockcrow.');">²</span>

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