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.
tirmidhi:444al-Aʿmash Naḥw Hadhā > Bidhalik Maḥmūd b. Ghaylān > Yaḥyá b. Ādam > Sufyān > al-Aʿmash > Abū ʿĪsá And ʾAkthar Mā Ruwī

(Another chain with similar narration)  

الترمذي:٤٤٤وَرَوَاهُ سُفْيَانُ الثَّوْرِيُّ عَنِ الأَعْمَشِ نَحْوَ هَذَا حَدَّثَنَا بِذَلِكَ مَحْمُودُ بْنُ غَيْلاَنَ حَدَّثَنَا يَحْيَى بْنُ آدَمَ عَنْ سُفْيَانَ عَنِ الأَعْمَشِ قَالَ أَبُو عِيسَى وَأَكْثَرُ مَا رُوِيَ

عَنِ النَّبِيِّ ﷺ فِي صَلاَةِ اللَّيْلِ ثَلاَثَ عَشْرَةَ رَكْعَةً مَعَ الْوِتْرِ وَأَقَلُّ مَا وُصِفَ مِنْ صَلاَتِهِ بِاللَّيْلِ تِسْعُ رَكَعَاتٍ  


See similar narrations below:

Collected by Aḥmad
ahmad:25858Ḥajjāj > Layth > Yazīd b. Abū Ḥabīb > ʿIrāk b. Mālik > ʿUrwahaʾan ʿĀʾishah

The Prophet ﷺ used to pray thirteen rak'ahs during the night including the two rak'ahs of the dawn prayer. (Using translation from Abū Dāʾūd 1360)   

أحمد:٢٥٨٥٨حَدَّثَنَا حَجَّاجٌ قَالَ حَدَّثَنَا لَيْثٌ قَالَ حَدَّثَنِي يَزِيدُ بْنُ أَبِي حَبِيبٍ عَنْ عِرَاكِ بْنِ مَالِكٍ عَنْ عُرْوَةَأَنَّ عَائِشَةَ أَخْبَرَتْهُ

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُصَلِّي ثَلَاثَ عَشْرَةَ رَكْعَةً بِاللَّيْلِ مَعَ رَكْعَتَيِ الْفَجْرِ