Narrated by Sayyiduna Anas bin Malik, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: Surah Al-Kafiroon is one-fourth of the Holy Qur'an.

Muhajir Abu Hasan narrates from an elder who met the Noble Prophet (peace and blessings be upon him), he says: I was with the Noble Prophet (peace and blessings be upon him) on a journey. The Prophet (peace and blessings be upon him) passed by a man who was reciting Surah Al-Kafirun. The Prophet (peace and blessings be upon him) said: He has become free from shirk (polytheism). Another man was reciting Surah Al-Ikhlas, about whom the Noble Prophet (peace and blessings be upon him) said: Through this Surah, Paradise has become obligatory for this man.

Narrated from Sayyiduna Naufal Ashja'i (may Allah be pleased with him), he says: The Noble Prophet (peace and blessings be upon him) gave me the daughter of Umm Salamah (may Allah be pleased with her) and said: You are the husband of the woman who nursed my daughter. She remained with me for as long as Allah willed, then when I came to the Prophet (peace and blessings be upon him), he asked: What happened to the girl? I said: She is with her mother. The Prophet (peace and blessings be upon him) said: Why have you come now? I said: Teach me what I should say when I go to sleep. The Prophet (peace and blessings be upon him) said: Recite Surah Al-Kafirun when you go to sleep, and when you finish it, then go to sleep. This is a declaration of disassociation and freedom from shirk (polytheism).