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
bayhaqi:5466 – ʿIkrimah Tisʿ ʿAshrah 5466 > ʿAlī b. Aḥmad b. ʿAbdān > Aḥmad b. ʿUbayd al-Ṣaffār > Abū ʿImrān > Ibrāhīm b. al-Ḥajjāj > ʿAbd al-Wārith > ʿAbbād b. Manṣūr > ʿIkrimah > Ibn ʿAbbās

[Machine] During the time of conquest, the Messenger of Allah ﷺ used to perform 19 units of prayer.  

البيهقي:٥٤٦٦ – وَرَوَاهُ ابْنُ مَنْصُورٍ عَنْ عِكْرِمَةَ تِسْعَ عَشْرَةَ 5466 أَخْبَرَنَاهُ عَلِيُّ بْنُ أَحْمَدَ بْنِ عَبْدَانَ أنبأ أَحْمَدُ بْنُ عُبَيْدٍ الصَّفَّارُ ثنا أَبُو عِمْرَانَ ثنا إِبْرَاهِيمُ بْنُ الْحَجَّاجِ ثنا عَبْدُ الْوَارِثِ ثنا عَبَّادُ بْنُ مَنْصُورٍ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ قَالَ

أَقَامَ رَسُولُ اللهِ ﷺ زَمَنَ الْفَتْحِ تِسْعَةَ عَشَرَ لَيْلَةً يُصَلِّي رَكْعَتَيْنِ رَكْعَتَيْنِ  

See similar narrations below:

Collected by Bayhaqī
bayhaqi:5471 – Abū al-Ḥusayn b. al-Faḍl al-Qaṭṭān > ʿAbdullāh b. Jaʿfar > Yaʿqūb b. Sufyān > al-Ḥajjāj And Sulaymān b. Ḥarb > Ḥammād b. Salamah > Yaʿqūb > Abū Maʿmar > ʿAbd al-Wārith > ʿAlī b. Zayd > Abū Naḍrah > ʿImrān b. Ḥuṣayn

[Machine] The Messenger of Allah ﷺ stayed in Makkah during the time of conquest for eighteen nights, praying two units of prayer.  

البيهقي:٥٤٧١ – أَخْبَرَنَا أَبُو الْحُسَيْنِ بْنُ الْفَضْلِ الْقَطَّانُ أنبأ عَبْدُ اللهِ بْنُ جَعْفَرٍ ثنا يَعْقُوبُ بْنُ سُفْيَانَ ثنا الْحَجَّاجُ وَسُلَيْمَانُ بْنُ حَرْبٍ قَالَا ثنا حَمَّادُ بْنُ سَلَمَةَ قَالَ وَثنا يَعْقُوبُ ثنا أَبُو مَعْمَرٍ ثنا عَبْدُ الْوَارِثِ جَمِيعًا عَنْ عَلِيِّ بْنِ زَيْدٍ عَنْ أَبِي نَضْرَةَ عَنْ عِمْرَانَ بْنِ حُصَيْنٍ قَالَ

أَقَامَ رَسُولُ اللهِ ﷺ بِمَكَّةَ زَمَانَ الْفَتْحِ بِثَمَانِ عَشْرَةَ لَيْلَةً يُصَلِّي رَكْعَتَيْنِ رَكْعَتَيْنِ