"The Messenger of Allah ﷺ used to pray standing and sitting. If he started to pray standing, he would bow standing and if he started to pray sitting, he would bow sitting."  

كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي قَائِمًا وَقَاعِدًا فَإِذَا افْتَتَحَ الصَّلاَةَ قَائِمًا رَكَعَ قَائِمًا وَإِذَا افْتَتَحَ الصَّلاَةَ قَاعِدًا رَكَعَ قَاعِدًا  

The Messenger of Allah ﷺ used to pray standing at night for a long time, and used to pray sitting at night for a long time. When he prayed standing, he bowed standing, and when he prayed sitting, he bowed sitting.  

كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي لَيْلاً طَوِيلاً قَائِمًا وَلَيْلاً طَوِيلاً قَاعِدًا فَإِذَا صَلَّى قَائِمًا رَكَعَ قَائِمًا وَإِذَا صَلَّى قَاعِدًا رَكَعَ قَاعِدًا  

[Machine] The Prophet ﷺ used to pray while standing when he commenced the prayer, and he used to pray while sitting when he commenced the prayer while sitting.  

كَانَ نَبِيُّ اللهِ ﷺ إِذَا افْتَتَحَ الصَّلَاةَ قَائِمًا صَلَّى قَائِمًا وَإِذَا افْتَتَحَ الصَّلَاةَ قَاعِدًا صَلَّى قَاعِدًا  

[Machine] The Prophet ﷺ used to pray a lot, whether standing or sitting. When he prayed sitting, he would perform the sitting position as the prayer requires, and when he prayed standing, he would perform the standing position as the prayer requires.  

أَنَّ النَّبِيَّ ﷺ كَانَ يُكْثِرُ الصَّلَاةَ قَائِمًا وَقَاعِدًا فَإِذَا صَلَّى قَاعِدًا رَكَعَ قَاعِدًا وَإِذَا صَلَّى قَائِمًا رَكَعَ قَائِمًا  

The Messenger of Allah ﷺ used to pray standing at night for a long time, and used to pray sitting at night for a long time. When he prayed standing, he bowed standing, and when he prayed sitting, he bowed sitting. (Using translation from Abū Dāʾūd 955)   

كَانَ رَسُولُ اللهِ ﷺ يُكْثِرُ الصَّلَاةَ قَائِمًا وَقَاعِدًا فَإِذَا صَلَّى قَائِمًا رَكَعَ قَائِمًا وَإِذَا صَلَّى قَاعِدًا رَكَعَقَاعِدًا  

"The Messenger of Allah ﷺ used to pray standing and sitting. If he started to pray standing, he would bow standing and if he started to pray sitting, he would bow sitting." (Using translation from Nasāʾī 1647)  

كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي قَائِمًا وَقَاعِدًا فَإِذَا افْتَتَحَ الصَّلَاةَ قَائِمًا رَكَعَ قَائِمًا وَإِذَا افْتَتَحَ الصَّلَاةَ قَاعِدًا رَكَعَ قَاعِدًا  

"The Messenger of Allah ﷺ used to pray standing and sitting. If he started to pray standing, he would bow standing and if he started to pray sitting, he would bow sitting." (Using translation from Nasāʾī 1647)  

«كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي قَائِمًا وَقَاعِدًا فَإِذَا افْتَتَحَ الصَّلَاةَ قَائِمًا رَكَعَ قَائِمًا وَإِذَا افْتَتَحَ الصَّلَاةَ قَاعِدًا رَكَعَ قَاعِدًا»  

The Messenger of Allah ﷺ used to pray standing at night for a long time, and used to pray sitting at night for a long time. When he prayed standing, he bowed standing, and when he prayed sitting, he bowed sitting. (Using translation from Abū Dāʾūd 955)  

«كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي لَيْلًا طَوِيلًا قَائِمًا وَلَيْلًا طَوِيلًا قَاعِدًا فَإِذَا صَلَّى قَائِمًا رَكَعَ قَائِمًا وَإِذَا صَلَّى قَاعِدًا رَكَعَ قَاعِدًا»  

The Messenger of Allah ﷺ used to pray standing at night for a long time, and used to pray sitting at night for a long time. When he prayed standing, he bowed standing, and when he prayed sitting, he bowed sitting. (Using translation from Abū Dāʾūd 955)   

عَنْ صَلَاةِ رَسُولِ اللَّهِ ﷺ فَقَالَتْ «كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي لَيْلًا طَوِيلًا قَاعِدًا وَلَيْلًا طَوِيلًا قَائِمًا فَإِذَا صَلَّى قَاعِدًا رَكَعَ قَاعِدًا وَإِذَا صَلَّى قَائِمًا رَكَعَ قَائِمًا»  

"The Messenger of Allah ﷺ used to pray standing and sitting. If he started to pray standing, he would bow standing and if he started to pray sitting, he would bow sitting." (Using translation from Nasāʾī 1647)  

«كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي قَائِمًا وَقَاعِدًا فَإِذَا افْتَتَحَ الصَّلَاةَ قَائِمًا رَكَعَ قَائِمًا وَإِذَا افْتَتَحَ الصَّلَاةَ قَاعِدًا رَكَعَ قَاعِدًا»  

The Messenger of Allah ﷺ used to pray standing at night for a long time, and used to pray sitting at night for a long time. When he prayed standing, he bowed standing, and when he prayed sitting, he bowed sitting. (Using translation from Abū Dāʾūd 955)  

أَنَّهَا قَالَتْ «كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي لَيْلًا طَوِيلًا قَائِمًا وَلَيْلًا طَوِيلًا قَاعِدًا فَإِذَا صَلَّى قَائِمًا رَكَعَ قَائِمًا وَإِذَا صَلَّى قَاعِدًا رَكَعَ قَاعِدًا»  

I asked 'A'isha about the prayer of the Messenger of Allah ﷺ. She said: The Messenger of Allah ﷺ would observe prayer (Nafl) in a standing position as well as in a sitting position, and when he commenced the prayer in a standing position, he bowed in this very position, and when he commenced the prayer in a sitting position, he bowed in this very position. (Using translation from Muslim 730e)   

صَلَاةِ رَسُولِ اللهِ ﷺ فَقَالَتْ كَانَ رَسُولُ اللهِ ﷺ يُكْثِرُ الصَّلَاةَ قَائِمًا وَقَاعِدًا فَإِذَا افْتَتَحَ الصَّلَاةَ قَائِمًا رَكَعَ قَائِمًا وَإِذَا افْتَتَحَ الصَّلَاةَ قَاعِدًا رَكَعَ قَاعِدًا