The chapter also mentions the People of Jonah, who at first rejected Jonah's message, but then repented and believed. Therefore, unlike the people of Noah and Moses, they were averted from God's punishment. The mention of Jonah in verse 98 gives the chapter its name. The chapter then instructs Muhammad if he had any doubt about the truth of what was revealed to him, he could ask other People of the Book (i.e. the Jews and the Christians) who would be able to confirm the Quran's account of these people of the past.