Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
ahmad:20989 – ʿAbd al-Raḥman b. Mahdī > Zāʾidah > Simāk b. Ḥarb > Jābir b. Samurah

[Machine] The Messenger of Allah ﷺ used to recite 'Qaf' during the Fajr prayer. And his prayer used to be lightened after it.  

أحمد:٢٠٩٨٩ – حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ حَدَّثَنَا زَائِدَةُ عَنْ سِمَاكِ بْنِ حَرْبٍ عَنْ جَابِرِ بْنِ سَمُرَةَ قَالَ

كَانَ رَسُولُ اللهِ ﷺ يَقْرَأُ فِي الصُّبْحِ بِ ق وَكَانَ صَلَاتُهُ بَعْدُ تَخْفِيفًا  

See similar narrations below:

Collected by Muslim, Ibn Ḥibbān, Ṭabarānī
muslim:458a – Abū Bakr b. Abū Shaybah > Ḥusayn b. ʿAlī > Zāʾidah > Simāk b. Ḥarb > Jābir b. Samurah

The Apostle of Allah ﷺ used to recite in the morning prayer" Qaf. By the Glorious Quran." and his prayer afterward shortened.  

مسلم:٤٥٨a – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا حُسَيْنُ بْنُ عَلِيٍّ عَنْ زَائِدَةَ حَدَّثَنَا سِمَاكُ بْنُ حَرْبٍ عَنْ جَابِرِ بْنِ سَمُرَةَ قَالَ

إِنَّ النَّبِيَّ ﷺ كَانَ يَقْرَأُ فِي الْفَجْرِ بِ { ق وَالْقُرْآنِ الْمَجِيدِ} وَكَانَ صَلاَتُهُ بَعْدُ تَخْفِيفًا  

ذِكْرُ مَا يَقْرَأُ الْمَرْءُ فِي صَلَاةِ الْغَدَاةِ مِنَ السُّوَرِ

ibnhibban:1816 – al-Faḍl b. al-Ḥubāb > Abū al-Walīd al-Ṭayālisī > Zāʾidah b. Qudāmah > Simāk b. Ḥarb > Jābir b. Samurah

[Machine] "The Prophet ﷺ used to recite in the morning prayer, 'Qaf. By the honoured Quran.' He said, 'And his prayer was done with moderation afterwards.'"  

ابن حبّان:١٨١٦ – أَخْبَرَنَا الْفَضْلُ بْنُ الْحُبَابِ قَالَ حَدَّثَنَا أَبُو الْوَلِيدِ الطَّيَالِسِيُّ قَالَ حَدَّثَنَا زَائِدَةُ بْنُ قُدَامَةَ قَالَ حَدَّثَنَا سِمَاكُ بْنُ حَرْبٍ عَنْ جَابِرِ بْنِ سَمُرَةَ

«أَنَّ النَّبِيَّ ﷺ كَانَ يَقْرَأُ فِي الصُّبْحِ بِ {ق وَالْقُرْآنِ الْمَجِيدِ} قَالَ وَكَانَتْ صَلَاتُهُ بَعْدُ تَخْفِيفًا»  

tabarani:1929 – [Chain 1] Muḥammad b. al-Naḍr al-Azdī > Muʿāwiyah b. ʿAmr [Chain 2] Abū Khalīfah And Muḥammad b. Ibrāhīm al-Ṭayālisī > Abū al-Walīd > Zāʾidah [Chain 3] Isḥāq b. Ibrāhīm al-Dabarī > ʿAbd al-Razzāq > Isrāʾīl > Simāk > Jābir b. Samurah

[Machine] The Messenger of Allah ﷺ used to recite Surah Qaf and the Majestic Quran in the Fajr prayer, and his prayer was gentle.  

الطبراني:١٩٢٩ – حَدَّثَنَا مُحَمَّدُ بْنُ النَّضْرِ الْأَزْدِيُّ ثنا مُعَاوِيَةُ بْنُ عَمْرٍو ح وَحَدَّثَنَا أَبُو خَلِيفَةَ وَمُحَمَّدُ بْنُ إِبْرَاهِيمَ الطَّيَالِسِيُّ قَالَا ثنا أَبُو الْوَلِيدِ ثنا زَائِدَةُ ح وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ الدَّبَرِيُّ عَنْ عَبْدِ الرَّزَّاقِ عَنْ إِسْرَائِيلَ عَنْ سِمَاكٍ عَنْ جَابِرِ بْنِ سَمُرَةَ قَالَ

كَانَ رَسُولُ اللهِ ﷺ «يَقْرَأُ فِي صَلَاةِ الْفَجْرِ بِ ق وَالْقُرْآنِ الْمَجِيدِ وَكَانَتْ صَلَاتُهُ بَعْدَ تَخْفِيفٍ»