Reference for Rosh Hashanah 47:19

<big><strong>גמ׳</strong></big> ומי שרי והכתיב (שמות כ, כג) לא תעשון אתי לא תעשון כדמות שמשיי

Rab Judah said in the name of Samuel: The halachah is as laid down by R'Eleazar B'Zadok. Abaye said: We have also learnt to the same effect: 'If the Beth din and all Israel saw it,<span class="x" onmousemove="('comment',' On the thirtieth day.');">²¹</span>

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