Halakhah for Sotah 33:21
דרש רבא בשכר שאמר אברהם אבינו (בראשית יד, כג) אם מחוט ועד שרוך נעל זכו בניו לב' מצות חוט של תכלת ורצועה של תפלין
Raba said: Why does the Torah command that dust should be provided for [the ceremony of] a suspected woman? If she be innocent, there will issue from her a son like our father Abraham, of whom it is written: Dust and ashes;<span class="x" onmousemove="('comment',' Gen XVIII, 27. ');"><sup>20</sup></span>
Treasures Hidden in the Sand
1. The color of the body of the Hillazon resembles the color of the sea as the Rabbis in Tractate Menachot (44A) taught that the color of the Hillazon resembles the color of the sea. Rashi explains that the Hillazon emerges from the sea and the Techelet resembles the sea, that is to say that the sea it is found in and that it emerges from is the cause of its color.
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