Yochanan 20:25

Therefore the other talmidim were saying to him, Ra'i'nu es Rebbe, Melech HaMoshiach Adoneinu (We have seen Rebbe, Melech HaMoshiach Adoneinu!) But T'oma said to them, Unless I see in his hands the mark of the nails and I put my finger into the place of the nails and also put my hand into his side, I will never have emunah (faith).