Responsa for Zevachim 80:3
ואי כתב רחמנא בדם ה"א אפי' מספג כתב רחמנא וטבל
It was taught in accordance with R. Papa: 'Thus shall he do...as he did': why does Scripture say, 'with the bullock'? - To include the bullock of the Day of Atonement in respect of all that is prescribed in this passage: that is Rabbi's view. Said R. Ishmael: It follows a fortiori: if rites [of diverse sacrifices] were assimilated to each other even where the sacrifices are not the same, Surely rites are assimilated to each other where the sacrifices are the same. What then does Scripture intimate by [the phrase] 'with the bullock'? This refers to the bullock brought for the community's unwitting transgression; while [the other] 'with the bullock' refers to the bullock of the anointed priest. <br>
Teshuvot Maharam
A. In order to make sure that he takes Hallah from dough that is subject to that law, the Jew must take as Hallah a piece that is larger than the Gentile's dough.
SOURCES: Cr. 40; Pr. 423; P. 225; cf. Am I, 59.