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
nasai-kubra:4670 – Qutaybah b. Saʿīd > Mālik > Muḥammad b. Yūsuf > al-Sāʾib b. Yazīd > Amar ʿUmar b. al-Khaṭṭāb Ubay b. Kaʿb And Tamīm al-Dārī

[Machine] That they should perform eleven units of prayer for the people.  

الكبرى للنسائي:٤٦٧٠ – أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ عَنْ مَالِكٍ عَنْ مُحَمَّدِ بْنِ يُوسُفَ عَنِ السَّائِبِ بْنِ يَزِيدَ قَالَ أَمَرَ عُمَرُ بْنُ الْخَطَّابِ أُبَيَّ بْنَ كَعْبٍ وَتَمِيمًا الدَّارِيَّ

أَنْ «يَقُومَا لِلنَّاسِ بِإِحْدَى عَشْرَةَ رَكْعَةً»