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.
bayhaqi:3154Abū ʿAbdullāh al-Ḥāfiẓ > ʿAbdullāh b. Muḥammad b. Mūsá > Muḥammad b. Ghālib > Muʿallá b. Manṣūr > Muḥammad b. Jābir > Ḥammād > Ibrāhīm > ʿAlqamah And al-Aswad > ʿAbdullāh b. Masʿūd

[Machine] The Messenger of Allah used to concentrate in his prayers.  

البيهقي:٣١٥٤أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا عَبْدُ اللهِ بْنُ مُحَمَّدِ بْنِ مُوسَى ثنا مُحَمَّدُ بْنُ غَالِبٍ ثنا مُعَلَّى بْنُ مَنْصُورٍ ثنا مُحَمَّدُ بْنُ جَابِرٍ عَنْ حَمَّادٍ عَنْ إِبْرَاهِيمَ عَنْ عَلْقَمَةَ وَالْأَسْوَدِ عَنْ عَبْدِ اللهِ بْنِ مَسْعُودٍ ؓ قَالَ

مَا قَنَتَ رَسُولُ اللهِ ﷺ فِي شَيْءٍ مِنْ صَلَوَاتِهِ كَذَا  

رَوَاهُ مُحَمَّدُ بْنُ جَابِرٍ السُّحَيْمِيُّ وَهُوَ مَتْرُوكٌ