Reference for Zevachim 125:20
כל העולין למזבח עולין דרך ימין
BY THE SOUTH-WEST HORN. NOW, IT WAS FIT [IF DONE] IN ANY PLACE, BUT THIS WAS ITS [PARTICULAR] PLACE.<span class="x" onmousemove="('comment',' The Gemara discusses what this means,');"><sup>26</sup></span> THAT HORN SERVED FOR THREE THINGS BELOW, AND THREE THINGS ABOVE.<span class="x" onmousemove="('comment',' 'Below' and 'above' refer to the scarlet line which encompassed the altar.');"><sup>27</sup></span> BELOW: FOR THE SIN-OFFERING OF THE BIRD, FOR THE PRESENTING [OF MEAL-OFFERINGS].<span class="x" onmousemove="('comment',' Before their fistfuls were taken they were presented ('brought near') at this horn.');"><sup>28</sup></span> AND FOR THE RESIDUE OF THE BLOOD.<span class="x" onmousemove="('comment',' Of the outer sin-offerings. These were sprinkled there.');"><sup>29</sup></span> ABOVE: FOR THE POURING OUT OF WINE AND WATER, AND FOR THE BURNT-OFFERING OF A BIRD WHEN THE EAST WAS TOO MUCH OCCUPIED.<span class="x" onmousemove="('comment',' Its proper place was at the south-east horn, but if many animal burnt-offerings were being sacrificed there, this was offered at the south-west horn, above the line.');"><sup>30</sup></span> ALL WHO ASCENDED THE ALTAR ASCENDED BY THE RIGHT,