"The Messenger of Allah ﷺ used to pray witr with nine rak'ahs, then he would pray two rak'ahs sitting down. When he grew weaker he prayed witr with seven rak'ahs, then he prayed two rak'ahs sitting down."
أَنَّهُ سَمِعَهَا تَقُولُ إِنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُوتِرُ بِتِسْعِ رَكَعَاتٍ ثُمَّ يُصَلِّي رَكْعَتَيْنِ وَهُوَ جَالِسٌ فَلَمَّا ضَعُفَ أَوْتَرَ بِسَبْعِ رَكَعَاتٍ ثُمَّ صَلَّى رَكْعَتَيْنِ وَهُوَ جَالِسٌ
[Machine] The Prophet ﷺ used to perform nine units of prayer (raka'at) in Tahajjud (night prayer). When the time of dawn approached and it was about to rise, he would perform seven units of prayer, then he would perform two units of prayer while sitting, and he would say the Taslim (completion of prayer) [at the end of those two units].
أَنَّ النَّبِيَّ ﷺ كَانَ يُوتِرُ بِتِسْعِ رَكَعَاتٍ فَلَمَّا بَدَّنَوَلَحُمَ صَلَّى سَبْعَ رَكَعَاتٍ ثُمَّ صَلَّى رَكْعَتَيْنِ وَهُوَ جَالِسٌ قَالَ عَفَّانُ فَلَمَّا لَحُمَ وَبَدَّنَ
"The Messenger of Allah ﷺ used to pray witr with nine rak'ahs, then he would pray two rak'ahs sitting down. When he grew weaker he prayed witr with seven rak'ahs, then he prayed two rak'ahs sitting down." (Using translation from Nasāʾī 1722)
أَنَّهُ سَمِعَ عَائِشَةَ تَقُولُ كَانَ رَسُولُ اللهِ ﷺ يُوتِرُ بِتِسْعِ رَكَعَاتٍ وَرَكْعَتَيْنِ وَهُوَ جَالِسٌ فَلَمَّا ضَعُفَ أَوْتَرَ بِسَبْعٍ وَرَكْعَتَيْنِ وَهُوَ جَالِسٌ
"The Messenger of Allah ﷺ used to pray witr with nine rak'ahs, then he would pray two rak'ahs sitting down. When he grew weaker he prayed witr with seven rak'ahs, then he prayed two rak'ahs sitting down." (Using translation from Nasāʾī 1722)
أَنَّهُ سَمِعَهَا تَقُولُ إِنَّ رَسُولَ اللهِ ﷺ كَانَ «يُوتِرُ بِتِسْعِ رَكَعَاتٍ ثُمَّ يُصَلِّي رَكْعَتَيْنِ وَهُوَ جَالِسٌ فَلَمَّا ضَعُفَ أَوْتَرَ بِسَبْعِ رَكَعَاتٍ ثُمَّ يُصَلِّي رَكْعَتَيْنِ وَهُوَ جَالِسٌ»