Reference for Zevachim 105:10

שירי הדם כו': ת"ר אל יסוד מזבח זה יסוד דרומי אתה אומר זה יסוד דרומי או אינו אלא יסוד מערבי

What was [this allusion to] Rabbi and R'Eleazar son of R'Simeon? - As it was taught: The upper blood is applied above the scarlet line, and the lower blood is applied below the scarlet line: that is Rabbi's view. R'Eleazar son of R'Simeon said: This holds good only of a burnt-offering of a bird; but in the case of an animal sin-offering, its [blood] is applied essentially on the very horn.<span class="x" onmousemove="('comment',' V. supra 10a.');">¹²</span>

Jastrow