"We used to prepare siwak and water for wudu for the Messenger of Allah ﷺ. Allah (SWT) would wake him when He willed to wake him at night, then he would clean his teeth and make wudu, and pray nine rak'ahs, not sitting until the eighth, when he would praise Allah (SWT) and send blessings upon His Prophet and supplicate between them, but he did not say the taslim. Then he prayed the ninth and sat, and said something similar, praising Allah (SWT) and sending blessings upon His Prophet ﷺ, then he said a taslim that we could hear, then he prayed two rak'ahs sitting down."  

كُنَّا نُعِدُّ لِرَسُولِ اللَّهِ ﷺ سِوَاكَهُ وَطَهُورَهُ فَيَبْعَثُهُ اللَّهُ ﷻ لِمَا شَاءَ أَنْ يَبْعَثَهُ مِنَ اللَّيْلِ فَيَسْتَاكُ وَيَتَوَضَّأُ وَيُصَلِّي تِسْعَ رَكَعَاتٍ لاَ يَجْلِسُ فِيهِنَّ إِلاَّ عِنْدَ الثَّامِنَةِ وَيَحْمَدُ اللَّهَ وَيُصَلِّي عَلَى نَبِيِّهِ ﷺ وَيَدْعُو بَيْنَهُنَّ وَلاَ يُسَلِّمُ تَسْلِيمًا ثُمَّ يُصَلِّي التَّاسِعَةَ وَيَقْعُدُ وَذَكَرَ كَلِمَةً نَحْوَهَا وَيَحْمَدُ اللَّهَ وَيُصَلِّي عَلَى نَبِيِّهِ ﷺ وَيَدْعُو ثُمَّ يُسَلِّمُ تَسْلِيمًا يُسْمِعُنَا ثُمَّ يُصَلِّي رَكْعَتَيْنِ وَهُوَ قَاعِدٌ  

"I said: 'O Mother of the believers! Tell me about the Witr of the Messenger of Allah ﷺ.' She said: 'We used to prepare his siwak and water for purification, then Allah (SWT) would wake him when He willed to wake him at night. He would use the siwak and perform wudu, then pray eith rak'ahs; not sitting until the eighth rak'ah, when he would sit and remember Allah (SWT) and call upon Him. Then he would say the taslim loud enough for us to hear.'" (Using translation from Nasāʾī 1315)   

عَنْ وِتْرِ رَسُولِ اللَّهِ ﷺ فَقَالَتْ «كُنَّا نُعِدُّ لَهُ سِوَاكَهُ وَطَهُورَهُ فَيَبْعَثُهُ اللَّهُ لِمَا شَاءَ أَنْ يَبْعَثَهُ مِنَ اللَّيْلِ فَيَتَسَوَّكُ وَيَتَوَضَّأُ ثُمَّ يُصَلِّي سَبْعَ رَكَعَاتٍ وَلَا يَجْلِسُ فِيهِنَّ إِلَّا عِنْدَ السَّادِسَةِ فَيَجْلِسُ وَيَذْكُرُ اللَّهَ وَيَدْعُو»  

"I said: 'O Mother of the believers! Tell me about the Witr of the Messenger of Allah ﷺ.' She said: 'We used to prepare his siwak and water for purification, then Allah (SWT) would wake him when He willed to wake him at night. He would use the siwak and perform wudu, then pray eith rak'ahs; not sitting until the eighth rak'ah, when he would sit and remember Allah (SWT) and call upon Him. Then he would say the taslim loud enough for us to hear.'" (Using translation from Nasāʾī 1315)   

عَنْ وِتْرِ رَسُولِ اللهِ ﷺ قَالَتْ كُنَّا «نَعُدُّ لَهُ سِوَاكَهُ وَطَهُورَهُ فَيَبْعَثُهُ اللهُ لَمَّا شَاءَ أَنْ يَبْعَثَهُ مِنَ اللَّيْلِ فَيَتَسَوَّكُ وَيَتَوَضَّأُ يُصَلِّي ثَمَانِي رَكَعَاتٍ لَا يَجْلِسُ فِيهِنَّ إِلَّا عِنْدَ الثَّامِنَةِ فَيَجْلِسُ فَيَذْكُرُ اللهَ وَيَدْعُو»  

[Machine] Narrated from Witr, the Messenger of Allah ﷺ said, "We used to prepare his purification and toothbrush for him, then Allah would send him to what He wanted to send him in the night. So, he would cleanse himself and perform ablution and then pray nine rak'ahs, in which he would not sit except during the eighth one, where he would praise his Lord and supplicate to Him and remember Him. Then he would rise without giving salaam and perform the ninth rak'ah, in which he would sit and praise his Lord, supplicate, and remember Him. Then he would give salaam audibly for us to hear. After that, he would perform two rak'ahs while sitting, after giving salaam in a state of sitting. Those are the eleven rak'ahs, O my son."  

عَنْ وِتْرِ رَسُولِ اللهِ ﷺ قَالَتْ كُنَا نُعِدُّ لَهُ طَهُورَهُ وَسِوَاكَهُ فَيَبْعَثُهُ اللهُ لِمَا شَاءَ أَنْ يَبْعَثَهُ مِنَ اللَّيْلِ «فَيَتَسَوَّكُ وَيَتَوَضَّأُ ثُمَّ يُصَلِّي تِسْعَ رَكَعَاتٍ لَا يَجْلِسُ فِيهِنَّ إِلَّا عِنْدَ الثَّامِنَةِ فَيَحْمَدُ رَبَّهُ وَيَدْعُو وَيَذْكُرُهُ ثُمَّ يَنْهَضُ وَلَا يُسَلِّمُ وَيُصَلِّي التَّاسِعَةَ فَيَجْلِسُ فَيَذْكُرُ رَبَّهُ وَيَحْمَدُهُ وَيَدْعُو ثُمَّ يُسَلِّمُ تَسْلِيمًا يُسْمِعُنَا ثُمَّ يُصَلِّي رَكْعَتَيْنِ وَهُوَ قَاعِدٌ بَعْدَمَا يُسَلِّمُ فَتِلْكَ إِحْدَى عَشْرَةَ رَكْعَةً يَا بُنَيَّ»