Full Idea
No testimony is sufficient to establish a miracle, unless the testimony be of such a kind that its falsehood would be more miraculous than the fact which it endeavours to establish.
Gist of Idea
To establish a miracle the falseness of the evidence must be a greater miracle than the claimed miraculous event
Source
David Hume (Enquiry Conc Human Understanding [1748], X.I.91)
Book Reference
Hume,David: 'Enquiries Conc. Human Understanding, Morals', ed/tr. Selby-Bigge/Nidditch [OUP 1975], p.116