Reference for Rosh Hashanah 68:12
פשיטא הא דאורייתא הא דרבנן לא צריכא דאף על גב דהא ודאי והא ספק:
Surely this is self-evident: the former precept is of Pentateuchal sanction, the latter [only] of Rabbinic! - It was necessary to state the rule, [to show that it still applies] even though he is certain of [finding an opportunity for] the latter and not certain of [finding an opportunity for] the former.<span class="x" onmousemove="('comment',' He can always find ten men to make a congregation, but he may come too late to hear the shofar.');"><sup>16</sup></span> JUST AS THE CONGREGATIONAL READER IS UNDER OBLIGATION, SO EVERY INDIVIDUAL etc. It has been taught: 'They said to Rabban Gamaliel: Accepting your view,<span class="x" onmousemove="('comment',' That the reader may recite on behalf of the congregation.');"><sup>17</sup></span> why do the congregation [first] say the ['Amidah] prayer?