Related for Yoma 52:7
ואימא אידי ואידי בתמיד של שחר ואמר רחמנא עביד והדר עביד א"כ נימא קרא ובער ובער
One said to the priest offering the libation: Hold your hands up! For it happened once that he poured it upon his feet and all the people stoned him with their citrons.<span class="x" onmousemove="('comment',' The Sadducees rejected the water libation, hence, when in charge, they would invalidate the ceremony. The people observant of such sabotage, punished the hypocrite by pelting him with their citrons (ethrog) . But these citrons were used only at the morning prayer. The Mishnah in Sukkoth mentions the citrons to indicate that the libation of the water took place only at the time citrons were part of the service, i.e., in the morning. The first proof was textual, the second factual.');"><sup>11</sup></span> This proves it. It was taught: R'Simeon B'Yohai said: Whence do we know that at the continual offering of dusk two logs of wood were to be brought up by two priests?