I also feel like that's such a silly requirement. Why three? "Alright, we all agree that God almighty intervened in our earthly affairs on your behalf, but if you wanna be remembered you better get him to do it twice more. We wanna be sure it wasn't a fluke when god helped you."
It's either that or
"Yeah we all get a miracle every now and again, don't freak out about it. I remember when I had my first, back in '68 I think, wild times. Oh wait you've had three? Why didn't you say so, right this way Mr. Saint"