English of Core Text: Rav Nachman bar Yitzchak said: concerning milah it is written “sign, covenant, generations,” and concerning Shabbos it is written “sign, covenant, generations” — from here, milah overrides Shabbos.
On the daf / in context: The shared vocabulary creates a gezerah-shavah-style linkage that privileges the timely performance of milah even on Shabbos.
Type of Learning
Gezeirah shavah / Custom
What Is Learned
The identical covenantal language of milah and Shabbos is the classic source for milah’s priority on the eighth day even when it falls on Shabbos.