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:25139a –
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السيوطي:٢٥١٣٩a –

"لا تُقْبَلُ صلاةُ الرَّجلِ لا يتمُّ الركوعَ والسُّجودَ".  

[طس] الطبرانى في الأوسط [طب] الطبرانى في الكبير [ض] ضياء المقدسي في مختاره عن أنس

See similar narrations below:

Collected by Ṭabarānī
tabarani:14713 – Aḥmad b. Muḥammad b. Ṣadaqah al-Baghdādī > Muḥammad b. Khālid b. Ḥalī al-Ḥimṣī from my father > Salamah b. ʿAbd al-Malik al-ʿAwaḍī > ʿAbd al-Raḥman b. Ḥumayd al-Ruʾāsī > ʿUmārah b. ʿUmayr > Abū Maʿmar > ʿUqbah b. ʿAmr

[Machine] On the authority of the Messenger of Allah, ﷺ , he said, "The prayer of a man is not accepted if he does not straighten his backbone during the bowing and prostration."  

الطبراني:١٤٧١٣ – حَدَّثَنَا أَحْمَدُ بْنُ مُحَمَّدِ بْنِ صَدَقَةَ الْبَغْدَادِيُّ ثَنَا مُحَمَّدُ بْنُ خَالِدِ بْنِ حَلِيٍّ الْحِمْصِيُّ ثَنَا أَبِي ثَنَا سَلَمَةُ بْنُ عَبْدِ الْمَلِكِ الْعَوَضِيُّ عَنْ عَبْدِ الرَّحْمَنِ بْنِ حُمَيْدٍ الرُّؤَاسِيِّ عَنْ عُمَارَةَ بْنِ عُمَيْرٍ عَنْ أَبِي مَعْمَرٍ عَنْ عُقْبَةَ بْنِ عَمْرٍو

عَنْ رَسُولِ اللهِ ﷺ قَالَ «لَا تُقْبَلُ صَلَاةُ رَجُلٍ لَا يُقِيمُ فِيهَا صُلْبَهُ لِلرُّكُوعِ وَالسُّجُودِ»