Liturgy for Niddah 122:24

אמר רב אחא בריה דרב ייבא משמיה דמר זוטרא

is not there, it is obviously assumed that a raven had carried it away. Here too, dye does not have the same effect on wool and flax and, since no [difference could be] discerned,<span class="x" onmousemove="('comment',' Even after the dye had been applied. ');">²¹</span>

Seder Ma'amadot