Hadith 81

Abu Hurayrah reported: "I went out with the Messenger of Allah and heard a man reciting Qul Huwa Allahu Ahad [Sūrah Al-Ikhlāṣ] so the Messenger of Allah () said: 'It is obligatory.' I said: 'What is obligatory?' He said: 'Paradise (is obligatory as a reward for the man).'" Reference: Jami` at-Tirmidhi 2897.

عَنْ أَبِي هُرَيْرَةَ، قَالَ أَقْبَلْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَسَمِعَ رَجُلاً يَقْرَأُ ‏(‏قُلْ هُوَ اللَّهُ أَحَدٌ * اللَّهُ الصَّمَدُ ‏)‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ وَجَبَتْ ‏"‏ ‏.‏ قُلْتُ وَمَا وَجَبَتْ قَالَ ‏"‏ الْجَنَّةُ ‏"‏.‏

Reference: 1540700
In-book reference: Book 1, Hadith 81