Do not give up prayer at night, for the Messenger of Allah ﷺ would not leave it. Whenever he fell ill or lethargic, he would offer it sitting. (Using translation from Abū Dāʾūd 1307)   

لِي عَائِشَةُ لَا تَدَعْ قِيَامَ اللَّيْلِ فَإِنَّ رَسُولَ اللهِ ﷺ كَانَ لَا يَدَعُهُ وَكَانَ إِذَا مَرِضَ أَوْ كَسِلَ صَلَّى قَاعِدًا  

Do not give up prayer at night, for the Messenger of Allah ﷺ would not leave it. Whenever he fell ill or lethargic, he would offer it sitting. (Using translation from Abū Dāʾūd 1307)   

لِي عَائِشَةُ لَا تَدَعْ قِيَامَ اللَّيْلِ «فَإِنَّ رَسُولَ اللَّهِ ﷺ كَانَ لَا يَذَرُهُ وَكَانَ إِذَا مَرِضَ أَوْ كَسِلَ صَلَّى قَاعِدًا»  

[Machine] Aisha would not neglect night prayer, for the Messenger of Allah ﷺ would never neglect it. And when he became ill or said she was lazy, he would pray sitting down. Shu'bah narrated from Yazid ibn Khumayr, and Muawiyah ibn Salih narrated from Abdullah ibn Abi Qais, and he is the most reliable.  

عَائِشَةُ ؓ لَا تَدَعْ قِيَامَ اللَّيْلِ فَإِنَّ رَسُولَ اللهِ ﷺ كَانَ لَا يَدَعُهُ وَكَانَ إِذَا مَرِضَ أَوْ قَالَتْ كَسِلَ صَلَّى قَاعِدًا كَذَا قَالَ شُعْبَةُ عَنْ يَزِيدَ بْنِ خُمَيْرٍ وَقَالَ مُعَاوِيَةُ بْنُ صَالِحٍ عَبْدُ اللهِ بْنُ أَبِي قَيْسٍ وَهُوَ أَصَحُّ  

'A'isha said, "Do not forget to stand up at night to pray. The Prophet, may Allah bless him and grant him peace, did not neglect to do it. If he was either ill or lazy, he prayed sitting down."  

قَالَتْ عَائِشَةُ لاَ تَدَعْ قِيَامَ اللَّيْلِ فَإِنَّ النَّبِيَّ ﷺ كَانَ لاَ يَذَرُهُ وَكَانَ إِذَا مَرِضَ أَوْ كَسِلَ صَلَّى قَاعِدًا