Reference for Rosh Hashanah 66:6

מי שבירך ואחר כך נתמנה לו שופר תוקע ומריע ותוקע שלש פעמים

AND THE LENGTH OF A TERU'AH TO THREE YEBABOTH.<span class="x" onmousemove="('comment',' Lit., 'moanings'. The meaning of this word is discussed in the Gemara infra.');">¹¹</span> IF ONE BLEW THE FIRST TEKI'AH<span class="x" onmousemove="('comment',' Of one set of three.');">¹²</span> [AS USUAL] AND PROLONGED THE SECOND SO AS TO MAKE IT EQUAL TO TWO, IT COUNTS ONLY AS ONE.<span class="x" onmousemove="('comment',' I.e., he cannot count half for one set and half for the next.');">¹³</span>

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