No Signs
They swear by Allah with their strongest oaths that if a sign were sent to them, they would surely believe. Say: Signs are with Allah alone, but even if they came, they would not believe.
6:109And they swear a solemn oath by Allah that if there come unto them a portent they will believe therein. Say; Portents are with Allah and (so is) that which telleth you that if such came unto them they would not believe.