He is such a doubting Thomas, he never believes anything until he sees it.
Он такой неверующий Фома, он никогда ничего не верит, пока не увидит это.
Definitions
A doubting Thomas is a person who is skeptical and refuses to believe something without direct, personal evidence. The term originates from the biblical story of Thomas the Apostle, who doubted the resurrection of Jesus until he saw and touched Jesus' wounds.
