Numan bin Bashir (May Allah be pleased with them) reported: Messenger of Allah (ﷺ) said, “The least tortured man on the Day of Resurrection is one underneath whose feet will be placed two live coal, and his brain will be boiling, and he would think that he is the most tortured, while he is the least tortured”,
[Al-Bukhari Book 08, Chapter 76, Hadith # 566]