[Machine] The Messenger of Allah ﷺ used to pray two units of prayer at night, then would leave and perform "istakah".
«كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي رَكْعَتَيْنِ مِنَ اللَّيْلِ ثُمَّ يَنْصَرِفُ فَيَسْتَاكُ»
"The Messenger of Allah used to pray in the night (Qiyamul-Lail) two Rak'ah by two, then when he finished he would use the tooth stick."
كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي بِاللَّيْلِ رَكْعَتَيْنِ رَكْعَتَيْنِ ثُمَّ يَنْصَرِفُ فَيَسْتَاكُ
"The Messenger of Allah used to pray in the night (Qiyamul-Lail) two Rak'ah by two, then when he finished he would use the tooth stick." (Using translation from Ibn Mājah 288)
كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي مِنَ اللَّيْلِ رَكْعَتَيْنِ ثُمَّ يَنْصَرِفُ فَيَسْتَاكُ
"The Messenger of Allah ﷺ used to pray nine rak'ahs at night." (Using translation from Nasāʾī 1725)
أَنَّهَا قَالَتْ كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي مِنَ اللَّيْلِ تِسْعَ رَكَعَاتٍ
"The Messenger of Allah ﷺ used to pray nine rak'ahs at night." (Using translation from Nasāʾī 1725)
كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي مِنَ اللَّيْلِ تِسْعَ رَكَعَاتٍ
"The Messenger of Allah used to pray in the night (Qiyamul-Lail) two Rak'ah by two, then when he finished he would use the tooth stick." (Using translation from Ibn Mājah 288)
«كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي رَكْعَتَيْنِ مِنَ اللَّيْلِ ثُمَّ يَنْصَرِفُ فَيَسْتَاكُ»
ذِكْرُ وَصْفِ عَدَدِ الرَّكَعَاتِ الَّتِي كَانَ يُصَلِّيهَا ﷺ بِاللَّيْلِ
The Messenger of Allah ﷺ used to observe thirteen rak'ahs of the night prayer. Five out of them consisted of Witr, and he did not sit, but at the end (for salutation). (Using translation from Muslim 737a)
«كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي مِنَ اللَّيْلِ ثَلَاثَ عَشْرَةَ رَكْعَةً»
Request/Fix translation
"عَنِ ابْنِ عَبَّاسٍ قَالَ: كَانَ رَسُولُ الله ﷺ يُصَلِّي مِنَ اللَّيْلِ رَكْعَتَيْنِ ثُمَّ يَنْصَرِفُ فَيَسْتَاك".