"The Messenger of Allah ﷺ used to pray witr with thirteen rak'ahs, but when he grew older and weaker he prayed witr with nine."  

كَانَ رَسُولُ اللَّهِ ﷺ يُوتِرُ بِثَلاَثَ عَشْرَةَ رَكْعَةً فَلَمَّا كَبِرَ وَضَعُفَ أَوْتَرَ بِتِسْعٍ  

"The Prophet would perform Witr with thirteen [Rak'ah]. When he was older and became weak he performed Witr with seven."  

كَانَ النَّبِيُّ ﷺ يُوتِرُ بِثَلاَثَ عَشْرَةَ رَكْعَةً فَلَمَّا كَبِرَ وَضَعُفَ أَوْتَرَ بِسَبْعٍ قَالَ وَفِي الْبَابِ عَنْ عَائِشَةَ  

[Machine] The Messenger of Allah ﷺ used to perform voluntary prayers called "Tahajjud" with nine rak'ahs. However, as he grew older and found it burdensome, he shortened it to seven rak'ahs.  

كَانَ رَسُولُ اللهِ ﷺ يُوتِرُ بِتِسْعٍ فَلَمَّا أَسَنَّ وثَقُلَ أَوْتَرَ بِسَبْعٍ  

"The Prophet would perform Witr with thirteen [Rak'ah]. When he was older and became weak he performed Witr with seven." (Using translation from Tirmidhī 457)   

«كَانَ النَّبِيُّ ﷺ يُوتِرُ بِثَلَاثَ عَشْرَةَ فَلَمَّا كَبِرَ وَضَعُفَ أَوْتَرَ بِسَبْعٍ»  

[Machine] The Messenger of Allah ﷺ used to pray thirteen raka'ah in the night, but when he became old or weak, he would pray seven raka'ah.  

كَانَ رَسُولُ اللهِ ﷺ «يُوتِرُ بِثَلَاثَ عَشْرَةَ فَلَمَّا كَبِرَ وَضَعُفَ أَوْتَرَ بِسَبْعٍ»  

[Machine] The translation of the passage from Arabic to English is: "The Messenger of Allah ﷺ used to perform the Witr prayer with nine units, but when it became difficult for him, he would perform Witr with seven units."  

«كَانَ رَسُولُ اللهِ ﷺ يُوتِرُ بِتِسْعٍ فَلَمَّا ثَقُلَ أَوْتَرَ بِسَبْعٍ»  

"The Messenger of Allah ﷺ used to pray witr with thirteen rak'ahs, but when he grew older and weaker he prayed witr with nine." (Using translation from Nasāʾī 1727)  

كَانَ رَسُولُ اللهِ ﷺ «يُوتِرُ بِثَلَاثَ عَشْرَةَ رَكْعَةً فَلَمَّا كِبَرَ وَضَعُفَ أَوْتَرَ بِتِسْعٍ»