English: “Blameless / perfect” — this teaches that Noach was born circumcised.
On the daf / in context: The title “tamim” is linked to the same language later applied to Avraham only after circumcision (“hithalekh lefanai ve-heyeh tamim”). Because Noach already bears the title, the midrash concludes he was born already circumcised.
Type of Learning
Custom (gezeirah shavah / parallel language of “tamim” applied to the status of circumcision).
What Is Learned
Noach was born circumcised; the epithet “tamim” signals that status.