‘Abdullah bin Mas’ud (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings of Allah be upon him) said:“Pessimism is shirk (associating partners with Allah).”1. (Ibn Mas’ud says:) There is none among us whose heart is not affected by such a thought, but Allah, due to reliance (tawakkul) on Him, removes that thought from the heart. Imam Tirmidhi says:
1- This hadith is hasan sahih; we know it only from the narration of Salamah bin Kuhayl,
2- Shu’bah has also narrated this hadith from Salamah, Imam Tirmidhi says:
3- I heard Muhammad bin Isma’il al-Bukhari say: Sulaiman bin Harb, regarding «وما منا ولكن الله يذهبه بالتوكل» , used to say that «وما منا» in my view is the statement of Abdullah bin Mas’ud (may Allah be pleased with him),
4- There are also narrations in this chapter from Abu Hurairah, Habis Tamimi, A’ishah, Ibn ‘Umar, and Sa’d (may Allah be pleased with them).