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
tabarani:9428 – Isḥāq b. Ibrāhīm > ʿAbd al-Razzāq > al-Thawrī > Abū Isḥāq > ʿAlqamah b. Qays

[Machine] Ibn Mas'ud used to not perform the Fajr prayer attentively.  

الطبراني:٩٤٢٨ – حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ عَنْ عَبْدِ الرَّزَّاقِ عَنِ الثَّوْرِيِّ عَنْ أَبِي إِسْحَاقَ عَنْ عَلْقَمَةَ بْنِ قَيْسٍ

«أَنَّ ابْنَ مَسْعُودٍ كَانَ لَا يَقْنُتُ فِي صَلَاةِ الْفَجْرِ»  

See similar narrations below:

Collected by Ṭabarānī
tabarani:9429 – Isḥāq b. Ibrāhīm > ʿAbd al-Razzāq > Maʿmar > Abū Isḥāq > ʿAlqamah And al-Aswad

[Machine] Ibn Mas'ood used to not be diligent in the dawn prayer.  

الطبراني:٩٤٢٩ – حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ عَنْ عَبْدِ الرَّزَّاقِ عَنْ مَعْمَرٍ عَنْ أَبِي إِسْحَاقَ عَنْ عَلْقَمَةَ وَالْأَسْوَدِ

«أَنَّ ابْنَ مَسْعُودٍ كَانَ لَا يَقْنُتُ فِي صَلَاةِ الْغَدَاةِ»