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
suyuti:7687a –
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السيوطي:٧٦٨٧a –

"إِنَّمَا تُنْصَرُ هَذِه الأُمَّةُ بِضَعِيفِها بِدَعْوَتِهم وَصَلَاتِهم وإِخْلَاصِهِم".  

[ن] النسائي عن مُصْعَب بن سعد عن أَبيه

See similar narrations below:

Collected by Nasāʾī, Nasāʾī's Kubrá, Suyūṭī
nasai:3178 – Muḥammad b. Idrīs > ʿUmar b. Ḥafṣ b. Ghiyāth from his father > Misʿar > Ṭalḥah b. Muṣarrif > Muṣʿab b. Saʿd from his father > Ẓan

"Rather, Allah support this Ummah because of their supplication, their Salah, and their sincerity."  

النسائي:٣١٧٨ – أَخْبَرَنَا مُحَمَّدُ بْنُ إِدْرِيسَ قَالَ حَدَّثَنَا عُمَرُ بْنُ حَفْصِ بْنِ غِيَاثٍ عَنْ أَبِيهِ عَنْ مِسْعَرٍ عَنْ طَلْحَةَ بْنِ مُصَرِّفٍ عَنْ مُصْعَبِ بْنِ سَعْدٍ عَنْ أَبِيهِ أَنَّهُ ظَنَّ

أَنَّ لَهُ فَضْلاً عَلَى مَنْ دُونَهُ مِنْ أَصْحَابِ النَّبِيِّ ﷺ فَقَالَ نَبِيُّ اللَّهِ ﷺ إِنَّمَا يَنْصُرُ اللَّهُ هَذِهِ الأُمَّةَ بِضَعِيفِهَا بِدَعْوَتِهِمْ وَصَلاَتِهِمْ وَإِخْلاَصِهِمْ  

nasai-kubra:4372 – Muḥammad b. Idrīs > ʿUmar / Ibn Ḥafṣ b. Ghiyāth from his father > Misʿar > Ṭalḥah > Muṣʿab b. Saʿd from his father > Ẓan

"Rather, Allah support this Ummah because of their supplication, their Salah, and their sincerity." (Using translation from Nasāʾī 3178)  

الكبرى للنسائي:٤٣٧٢ – أَخْبَرَنَا مُحَمَّدُ بْنُ إِدْرِيسَ قَالَ حَدَّثَنَا عُمَرُ وَهُوَ ابْنُ حَفْصِ بْنِ غِيَاثٍ عَنْ أَبِيهِ عَنْ مِسْعَرٍ عَنْ طَلْحَةَ عَنْ مُصْعَبِ بْنِ سَعْدٍ عَنْ أَبِيهِ أَنَّهُ ظَنَّ

أَنَّ لَهُ فَضْلًا عَلَى مَنْ دُونَهُ مِنْ أَصْحَابِ النَّبِيِّ ﷺ فَقَالَ نَبِيُّ اللهِ ﷺ «إِنَّمَا نَصْرُ اللهُ هَذِهِ الْأُمَّةَ بِضَعِيفِهَا بِدَعْوَتِهِمْ وَصَلَاتِهِمْ وَإِخْلَاصِهِمْ»