Related for Chullin 52:28
עד שתביא שתי שערות דברי ר"מ
Until the dark hairs appear in abundance over the white [skin].<span class="x" onmousemove="('comment',' V. Nid. 52a.');"><sup>13</sup></span>
Tosefta Sukkah
Should the first day fall on the eve of Sabbath they sound a plain note, but do not sound a tremolo. How do they sound? With a single plain, and not a tremulous, note. “The flute-playing supersedes the Sabbath” - the words of Rabbi Yose ben Rabbi Yehudah. But the sages say, “It does not supersede even the festival itself.”
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