Reference for Rosh Hashanah 60:11

כיון דלא אמור כלל אין לך שיבוש גדול מזה

<big><b>GEMARA: </b></big>How did the Levites go wrong in the daily Psalm?<span class="x" onmousemove="('comment',' Lit., 'song'. It was the custom for the Levites to chant a psalm while the drink-offering accompanying the daily sacrifices was being offered, as explained in the Gemara infra.');">¹¹</span> - Here [in Babylon] it was explained that they did not say any psalm at all.<span class="x" onmousemove="('comment',' Being in doubt whether to recite the festival psalm or that of the weekday, V. infra.');">¹²</span>

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