Reference for Makkot 26:19

ודלמא אזהרה לקרבן דהא פסח ומילה דלית בהו אזהרה לא מייתי קרבן

But maybe the scriptural warning is necessary to obligate one to bring a conciliatory sacrifice, that Pesach and circumcision which don't have a scriptual warning also don't have a conciliatory sacrifice.

Jastrow

Jastrow