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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
bayhaqi:4785 – Yaḥyá > Muḥammad > Bishr > al-Ḥumaydī > Sufyān > Yazīd b. Khuṣayfah > Muḥammad b. Shuraḥbīl > Raʾayt

[Machine] I saw Saad bin Abi Waqqas praying the Isha prayer, then he prayed an additional rak'ah after it.  

البيهقي:٤٧٨٥ – وَأَخْبَرَنَا يَحْيَى أنبأ مُحَمَّدٌ ثنا بِشْرٌ ثنا الْحُمَيْدِيُّ ثنا سُفْيَانُ ثنا يَزِيدُ بْنُ خُصَيْفَةَ عَنْ مُحَمَّدِ بْنِ شُرَحْبِيلَ قَالَ

رَأَيْتُ سَعْدَ بْنَ أَبِي وَقَّاصٍ ؓ يُصَلِّي الْعِشَاءَ ثُمَّ صَلَّى بَعْدَهَا رَكْعَةً