I heard it about the entire Gemara.
I have a shtickel raya that it’s not true, from the story of Rabba and R’ Zeira in Megilla (7b). One year at the Purim seuda, Rabba got drunk, shechted R’ Zeira, and then brought him back to life. The next year Rabba invited R’ Zeira again, but R’ Zeira declined, saying he was worried Rabba would shecht him again and a miracle wouldn’t occur this time.
Now, if this were true, 1) Why was it called a miracle? They knew how to do it, presumably through heejee beejee, so why would you call it a miracle? and 2) What’s the big deal? Just bring along some friends as backup, if Rabba can’t resuscitate him the others will!