Iyas reported on the authority of his father: We went along with Allah's Messenger (ﷺ) to visit a person suffering from fever. When I placed my hand upon him, I said: By Allah, I have never seen, till this day, a person running higher temperature than he. Thereupon Allah's Apostle (ﷺ) said: May I not inform you of a severer temperature than this which these two persons would run on the Day of Resurrection? (He said this) about two men riding and turning their backs, who were at that time amongst his Companions.
Hadith Referenceصحيح مسلم / كتاب صفات المنافقين وأحكامهم / 2783
Hadith Gradingمحدثین:أحاديث صحيح مسلم كلها صحيحة
Hadith Takhrij«أحاديث صحيح مسلم كلها صحيحة»
Explanation & Benefits
Shaykh Maulana Abdul Aziz Alvi
Hadith Commentary:Benefits and Issues: The hypocrites are counted among your companions because they used to recite the testimony of faith (kalimah) and claimed to have faith in you, and the noble Companions (Sahabah) were not aware of their inner reality.
Source: Tuhfat al-Muslim: Commentary on Sahih Muslim, Page: 7042