I shall watch the prayer of the Messenger of Allah ﷺ at night. I slept at the threshold of his door or of his tent. The Messenger of Allah ﷺ prayed two light rak'ahs, and then prayed two long, long, long rak'ahs. He then prayed two rak'ahs that were not so long as the two rak'ahs before them ; he then prayed two rak'ahs that were less in duration, than the rak'ahs before them; again he prayed two rak'ahs that were less in length then the preceding rak'ahs; he then prayed two rak'ahs that were less in length than the previous rak'ahs. This made altogether thirteen rak'ahs. (Using translation from Abū Dāʾūd 1366)  

ثنا الْقَعْنَبِيُّ عَنْ مَالِكٍ عَنْ عَبْدِ اللهِ بْنِ أَبِي بَكْرٍ عَنْ أَبِيهِ أَنَّ عَبْدَ اللهِ بْنَ قَيْسِ بْنِ مَخْرَمَةَ أَخْبَرَهُ عَنْ زَيْدِ بْنِ خَالِدٍ الْجُهَنِيِّ أَنَّهُ قَالَ لَأَرْمُقَنَّ صَلَاةَ رَسُولِ اللهِ ﷺ اللَّيْلَةَ فَتَوَسَّدْتُ عَتَبَتَهُ أَوْ فُسْطَاطَهُ «فَصَلَّى رَسُولُ اللهِ ﷺ رَكْعَتَيْنِ خَفِيفَتَيْنِ ثُمَّ صَلَّى رَكْعَتَيْنِ طَوِيلَتَيْنِ ثُمَّ صَلَّى رَكْعَتَيْنِ وَهُمَا دُونَ اللَّتَيْنِ قَبْلَهُمَا ثُمَّ صَلَّى رَكْعَتَيْنِ دُونَ اللَّتَيْنِ قَبْلَهُمَا ثُمَّ صَلَّى رَكْعَتَيْنِ دُونَ اللَّتَيْنِ قَبْلَهُمَا ثُمَّ أَوْتَرَ فَذَلِكَ ثَلَاثَ عَشْرَةَ»  

Quraish, Ansar, Muzaina, Juhaina and Ghifar, they are my friends and there is no friend of theirs besides Allah and His Messenger. (Using translation from Muslim 2520a)   

أَنَّ النَّبِيَّ ﷺ قَالَ «قُرَيْشٌ وَالْأَنْصَارُ وَأَسْلَمُ وَغِفَارُ وَمُزَيْنَةُ وَمَنْ كَانَ مِنْ جُهَيْنَةَ وأَشْجَعَ مَوَالِي لَيْسَ لَهُمْ دُونَ اللهِ وَرَسُولِهِ مَوْلَى»