that the Messenger of Allah ﷺ said: "Would one of you like to recite a third of the Qur'an during a night? Whoever recited: Allaahu Al-Wahid As-Samad then he has recited a third of the Qur'an."  

قَالَ رَسُولُ اللَّهِ ﷺ أَيَعْجَزُ أَحَدُكُمْ أَنْ يَقْرَأَ فِي لَيْلَةٍ ثُلُثَ الْقُرْآنِ مَنْ قَرَأَ اللَّهُ الْوَاحِدُ الصَّمَدُ فَقَدْ قَرَأَ ثُلُثَ الْقُرْآنِ وَفِي الْبَابِ عَنْ أَبِي الدَّرْدَاءِ وَأَبِي سَعِيدٍ وَقَتَادَةَ بْنِ النُّعْمَانِ وَأَبِي هُرَيْرَةَ وَأَنَسٍ وَابْنِ عُمَرَ وَأَبِي مَسْعُودٍ  

"I went out with the Messenger of Allah and heard a man reciting Qul Huwa Allahu Ahad [Allahus-Samad] so the Messenger of Allah ﷺ said: 'It is obligatory.' I said: 'What is obligatory?' He said: 'Paradise.'"  

أَقْبَلْتُ مَعَ رَسُولِ اللَّهِ ﷺ فَسَمِعَ رَجُلاً يَقْرَأُْ (قُلْ هُوَ اللَّهُ أَحَدٌ * اللَّهُ الصَّمَدُ ) فَقَالَ رَسُولُ اللَّهِ ﷺ وَجَبَتْ قُلْتُ وَمَا وَجَبَتْ قَالَ الْجَنَّةُ  

that the Prophet ﷺ said: "Whoever recited Qul Huwa Allahu Ahad two hundred times everyday, fifty years worth of his sins will be removed - unless he owed a debt." And another narration with this chain, from the Prophet ﷺ that he said: "Whoever wants to sleep upon his bed and sleeps on his right side, then he recites Qul Huwa Allahu Ahad one hundred times, then on the Day of Judgement the Lord, Blessed and Most High shall say: 'O My slave! Enter Paradise on your right.'"  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ قَرَأَ كُلَّ يَوْمٍ مِائَتَىْ مَرَّةٍ (قُلْ هُوَ اللَّهُ أَحَدٌ ) مُحِيَ عَنْهُ ذُنُوبُ خَمْسِينَ سَنَةً إِلاَّ أَنْ يَكُونَ عَلَيْهِ دَيْنٌ وَبِهَذَا الإِسْنَادِ عَنِ النَّبِيِّ ﷺ قَالَ مَنْ أَرَادَ أَنْ يَنَامَ عَلَى فِرَاشِهِ فَنَامَ عَلَى يَمِينِهِ ثُمَّ قَرَأَْ (قُلْ هُوَ اللَّهُ أَحَدٌ ) مِئَةَ مَرَّةٍ فَإِذَا كَانَ يَوْمُ الْقِيَامَةِ يَقُولُ لَهُ الرَّبُّ يَا عَبْدِي ادْخُلْ عَلَى يَمِينِكَ الْجَنَّةَ  

that the Messenger of Allah ﷺ said: "Qul Huwa Allahu Ahad is equal to a third of the Qur'an."  

قَالَ رَسُولُ اللَّهِ ﷺ (قُلْ هُوَ اللَّهُ أَحَدٌ ) تَعْدِلُ ثُلُثَ الْقُرْآنِ هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ  

that the Messenger of Allah ﷺ said: "Gather and I shall recite to you one third of the Qur'an." He said: "So whoever was to gather did so, then the Messenger of Allah ﷺ came out and recited Qul Huwa Allahu Ahad. Then he went back in. Some of them said to each other: "The Messenger of Allah ﷺ said: 'I shall recite to you one third of the Qur'an' I thought that this was news from the Heavens." Allah's Prophet ﷺ came out and said: "Indeed I said that I would recite to you one third of the Qur'an, and it is indeed equal to one third of the Qur'an."  

قَالَ رَسُولُ اللَّهِ ﷺ احْشِدُوا فَإِنِّي سَأَقْرَأُ عَلَيْكُمْ ثُلُثَ الْقُرْآنِ قَالَ فَحَشَدَ مَنْ حَشَدَ ثُمَّ خَرَجَ نَبِيُّ اللَّهِ ﷺ فَقَرَأَْ (قُلْ هُوَ اللَّهُ أَحَدٌ ) ثُمَّ دَخَلَ فَقَالَ بَعْضُنَا لِبَعْضٍ قَالَ رَسُولُ اللَّهِ ﷺ فَإِنِّي سَأَقْرَأُ عَلَيْكُمْ ثُلُثَ الْقُرْآنِ إِنِّي لأُرَى هَذَا خَبَرٌ جَاءَهُ مِنَ السَّمَاءِ ثُمَّ خَرَجَ نَبِيُّ اللَّهِ ﷺ فَقَالَ إِنِّي قُلْتُ سَأَقْرَأُ عَلَيْكُمْ ثُلُثَ الْقُرْآنِ أَلاَ وَإِنَّهَا تَعْدِلُ بثُلُثَ الْقُرْآنِ  

"There was a man from the Ansar who led them (in Salat) at Masjid Quba. Every time he was to recite a Surah for them during Salat, he would begin by reciting Qul Huwa Allahu Ahad until he finished, then he would recite another Surah with it. He did that in each Rak'ah. His companions talked to him and said: 'You recite this Surah. You should either recite it or leave it and recite another Surah.'" He said: "I shall not leave it, if you would like me to lead you with it then I shall do so, and if you do not like it then I shall leave you." And they considered him the best among them, and they did not like the idea of someone else leading them. So when the Prophet ﷺ came to them they informed him about what had happened and he ﷺ said: "O so-and-so! What prevents you from doing what your companions told you to do, why do recite this Surah in every Rak'ah" He said: "O Messenger of Allah! Indeed I love it." So the Messenger of Allah ﷺ said: "Your love for it shall have you admitted into Paradise."  

كَانَ رَجُلٌ مِنَ الأَنْصَارِ يَؤُمُّهُمْ فِي مَسْجِدِ قُبَاءَ فَكَانَ كُلَّمَا افْتَتَحَ سُورَةً يَقْرَأُ لَهُمْ فِي الصَّلاَةِ يَقْرَأَ بِهَا افْتَتَحَ بِ (قُلْ هُوَ اللَّهُ أَحَدٌ ) حَتَّى يَفْرُغَ مِنْهَا ثُمَّ يَقْرَأُ بِسُورَةٍ مَعَهَا وَكَانَ يَصْنَعُ ذَلِكَ فِي كُلِّ رَكْعَةٍ فَكَلَّمَهُ أَصْحَابُهُ فَقَالُوا إِنَّكَ تَقْرَأُ بِهَذِهِ السُّورَةِ ثُمَّ لاَ تَرَى أَنَّهَا تُجْزِيكَ حَتَّى تَقْرَأَ بِسُورَةٍ أُخْرَى فَإِمَّا أَنْ تَقْرَأَ بِهَا وَإِمَّا أَنْ تَدَعَهَا وَتَقْرَأَ بِسُورَةٍ أُخْرَى قَالَ مَا أَنَا بِتَارِكِهَا إِنْ أَحْبَبْتُمْ أَنْ أَؤُمَّكُمْ بِهَا فَعَلْتُ وَإِنْ كَرِهْتُمْ تَرَكْتُكُمْ وَكَانُوا يَرَوْنَهُ أَفْضَلَهُمْ وَكَرِهُوا أَنْ يَؤُمَّهُمْ غَيْرُهُ فَلَمَّا أَتَاهُمُ النَّبِيُّ ﷺ أَخْبَرُوهُ الْخَبَرَ فَقَالَ يَا فُلاَنُ مَا يَمْنَعُكَ مِمَّا يَأْمُرُ بِهِ أَصْحَابُكَ وَمَا يَحْمِلُكَ أَنْ تَقْرَأَ هَذِهِ السُّورَةَ فِي كُلِّ رَكْعَةٍ فَقَالَ يَا رَسُولَ اللَّهِ إِنِّي أُحِبُّهَا فَقَالَ رَسُولُ اللَّهِ ﷺ إِنَّ حُبَّهَا أَدْخَلَكَ الْجَنَّةَ