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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
nasai-kubra:11202 – Isḥāq b. Manṣūr > ʿAbd al-Raḥman > Sufyān from his father > Khaythamah

"Allah keeps those who believe steadfast with firm word in this world and the Hereafter" was revealed in connection with the torment of the grave. (Using translation from Muslim 2871b)  

الكبرى للنسائي:١١٢٠٢ – أَخْبَرَنَا إِسْحَاقُ بْنُ مَنْصُورٍ أَخْبَرَنَا عَبْدُ الرَّحْمَنِ عَنْ سُفْيَانَ عَنْ أَبِيهِ عَنْ خَيْثَمَةَ عَنِ الْبَرَاءِ بْنِ عَازِبٍ {يُثَبِّتُ اللهُ الَّذِينَ آمَنُوا بِالْقَوْلِ الثَّابِتِ فِي الْحَيَاةِ الدُّنْيَا} [إبراهيم 27] قَالَ

«نَزَلَتْ فِي عَذَابِ الْقَبْرِ»  

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Collected by Muslim
muslim:2871b – Abū Bakr b. Abū Shaybah And Muḥammad b. al-Muthanná Waʾabū Bakr b. Nāfiʿ > ʿAbd al-Raḥman Yaʿnūn Ibn Mahdī > Sufyān from his father > Khaythamah > al-Barāʾ

"Allah keeps those who believe steadfast with firm word in this world and the Hereafter" was revealed in connection with the torment of the grave.  

مسلم:٢٨٧١b – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ وَمُحَمَّدُ بْنُ الْمُثَنَّى وَأَبُو بَكْرِ بْنُ نَافِعٍ قَالُوا حَدَّثَنَا عَبْدُ الرَّحْمَنِ يَعْنُونَ ابْنَ مَهْدِيٍّ عَنْ سُفْيَانَ عَنْ أَبِيهِ عَنْ خَيْثَمَةَ عَنِ الْبَرَاءِ بْنِ عَازِبٍ { يُثَبِّتُ اللَّهُ الَّذِينَ آمَنُوا بِالْقَوْلِ الثَّابِتِ فِي الْحَيَاةِ الدُّنْيَا وَفِي الآخِرَةِ} قَالَ

نَزَلَتْ فِي عَذَابِ الْقَبْرِ