Passage John 18:9
In John 18:9 Jesus is made to say that he lost none of those given to him. In John 17:12 he says he guarded them and that none was lost except the son of destruction, which is one. The argument sets the two sayings side by side as a contradiction in the same Gospel. (The New Testament text is not yet on this site.)
Source: see Credits and references (no. 8, p. 7).