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
hakim:5656 – Abū ʿAmr b. al-Sammāk > al-Ḥusayn b. Abū Maʿshar > Wakīʿ b. al-Jarrāḥ > al-Masʿūdī > al-Qāsim b. ʿAbd al-Raḥman

[Machine] The first person to build a mosque and pray in it was Ammar ibn Yasir.  

الحاكم:٥٦٥٦ – أَخْبَرَنَا أَبُو عَمْرِو بْنُ السَّمَّاكِ ثَنَا الْحُسَيْنُ بْنُ أَبِي مَعْشَرٍ ثَنَا وَكِيعُ بْنُ الْجَرَّاحِ ثَنَا الْمَسْعُودِيُّ عَنِ الْقَاسِمِ بْنِ عَبْدِ الرَّحْمَنِ قَالَ

«أَوَّلُ مَنْ بَنَى مَسْجِدًا فَصَلَّى فِيهِ عَمَّارُ بْنُ يَاسِرٍ»