Nasai

(1) "To have faith (iman)"—this act is the root of faith, without which the very concept of the tree of faith and Islam cannot even be imagined. And without it, no righteous deed is of any benefit. When this faith exists, entry into Paradise is certain, whether immediately or after undergoing punishment. In this hadith, faith (iman) has been described as an action. This supports the view of the hadith scholars (muhaddithin) who consider actions to be a part of faith.

(2) In the Qur'anic verses, faith (iman) and righteous deeds (amal salih) are mentioned separately due to the importance of actions, just as, owing to the significance of the Asr prayer, there is a specific command to guard it separately: (Guard strictly the prayers, especially the middle prayer) (: al-Baqarah 2:238).