I did not see the Prophet ﷺ reciting (the Qur'an) in the night prayer while sitting except when he became old; when he used to recite while sitting, and when thirty or forty verses remained from the Sura, he would get up and recite them and then bow.  

مَا رَأَيْتُ النَّبِيَّ ﷺ يَقْرَأُ فِي شَىْءٍ مِنْ صَلاَةِ اللَّيْلِ جَالِسًا حَتَّى إِذَا كَبِرَ قَرَأَ جَالِسًا فَإِذَا بَقِيَ عَلَيْهِ مِنَ السُّورَةِ ثَلاَثُونَ أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَهُنَّ ثُمَّ رَكَعَ  

I did not see the Messenger of Allah ﷺ reciting (the Qur'an) in the night prayer in a sitting position, till he grew old and then he recited (it) in a sitting position, but when thirty or forty verses were left out of the Surah, he would then stand up, recite them and then bowed.  

مَا رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَقْرَأُ فِي شَىْءٍ مِنْ صَلاَةِ اللَّيْلِ جَالِسًا حَتَّى إِذَا كَبِرَ قَرَأَ جَالِسًا حَتَّى إِذَا بَقِيَ عَلَيْهِ مِنَ السُّورَةِ ثَلاَثُونَ أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَهُنَّ ثُمَّ رَكَعَ  

I never saw the Messenger of Allah ﷺ reciting the Quraan in his prayer at night in sitting condition until he became old. Then he used to sit in it (the prayer) and recite the Quran until forty or thirty verses remained, then he stood and recited them and prostrated himself.  

مَا رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَقْرَأُ فِي شَىْءٍ مِنْ صَلاَةِ اللَّيْلِ جَالِسًا قَطُّ حَتَّى دَخَلَ فِي السِّنِّ فَكَانَ يَجْلِسُ فِيهَا فَيَقْرَأُ حَتَّى إِذَا بَقِيَ أَرْبَعُونَ أَوْ ثَلاَثُونَ آيَةً قَامَ فَقَرَأَهَا ثُمَّ سَجَدَ  

“I did not see the Messenger of Allah ﷺ offer any of the night prayers in any way other than standing, until he became old. Then he started to pray sitting down until, when there were thirty or forty Verses left of his recitation, he would stand up and recite them, and prostrate.”  

مَا رَأَيْتُ رَسُولَ اللَّهِ ﷺ يُصَلِّي فِي شَىْءٍ مِنْ صَلاَةِ اللَّيْلِ إِلاَّ قَائِمًا حَتَّى دَخَلَ فِي السِّنِّ فَجَعَلَ يُصَلِّي جَالِسًا حَتَّى إِذَا بَقِيَ عَلَيْهِ مِنْ قِرَاءَتِهِ أَرْبَعُونَ آيَةً أَوْ ثَلاَثُونَ آيَةً قَامَ فَقَرَأَهَا وَسَجَدَ  

[Machine] The Messenger of Allah ﷺ used to pray while sitting after he reached old age, until the remaining verses of the Surah were thirty or forty, then he would stand and recite, then he would perform a bow.  

كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي جَالِسًا بَعْدَمَا دَخَلَ فِي السِّنِّ حَتَّى إِذَا بَقِيَ عَلَيْهِ مِنَ السُّورَةِ ثَلَاثُونَ أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَ ثُمَّ رَكَعَ  

[Machine] The Prophet ﷺ used to not recite anything from the night prayer while sitting until he reached an older age. And when there remained thirty or forty verses, he would stand and recite them, then he would prostrate.  

كَانَ النَّبِيُّ ﷺ لَا يَقْرَأُ فِي شَيْءٍ مِنْ صَلَاةِ اللَّيْلِ جَالِسًا حَتَّى دَخَلَ فِي السِّنِّ وَكَانَ إِذَا بَقِيَتْ عَلَيْهِ ثَلَاثُونَ آيَةً أَوْ أَرْبَعُونَ قَامَ فَقَرَأَهَا ثُمَّ سَجَدَ  

I never saw the Messenger of Allah ﷺ reciting the Quraan in his prayer at night in sitting condition until he became old. Then he used to sit in it (the prayer) and recite the Quran until forty or thirty verses remained, then he stood and recited them and prostrated himself. (Using translation from Abū Dāʾūd 953)   

مَا رَأَيْتُ رَسُولَ اللهِ ﷺ يَقْرَأُ فِي شَيْءٍ مِنْ صَلَاةِ اللَّيْلِ جَالِسًا حَتَّى دَخَلَ فِي السِّنِّ فَكَانَ يَجْلِسُ فَيَقْرَأُ حَتَّى إِذَا غَبَرَ مِنَ السُّورَةِ ثَلَاثُونَ أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَ بِهَا ثُمَّ رَكَعَ  

I did not see the Prophet ﷺ reciting (the Qur'an) in the night prayer while sitting except when he became old; when he used to recite while sitting, and when thirty or forty verses remained from the Sura, he would get up and recite them and then bow. (Using translation from Bukhārī 1148)  

مَا رَأَيْتُ النَّبِيَّ ﷺ يَقْرَأُ فِي شَيْءٍ مِنْ صَلَاةِ اللَّيْلِ جَالِسًا حَتَّى إِذَا كَبِرَ قَرَأَ جَالِسًا حَتَّى إِذَا بَقِيَ عَلَيْهِ مِنَ السُّورَةِ ثَلَاثُونَ أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَهُنَّ ثُمَّ رَكَعَ  

[Machine] When the Messenger of Allah ﷺ would sit and recite whatever Allah (glory be to Him) willed, he would continue until he completed thirty or forty verses from the Surah. Then, he would stand and recite them, and then prostrate.  

كَانَ رَسُولُ اللهِ ﷺ لَمَّا بَدَّنَ وَثَقُلَ يَقْرَأُ مَا شَاءَ اللهُ ﷻ وَهُوَ جَالِسٌ فَإِذَا غَبَرَ مِنَ السُّورَةِ ثَلَاثُونَ أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَهَا ثُمَّ سَجَدَ  

“I did not see the Messenger of Allah ﷺ offer any of the night prayers in any way other than standing, until he became old. Then he started to pray sitting down until, when there were thirty or forty Verses left of his recitation, he would stand up and recite them, and prostrate.” (Using translation from Ibn Mājah 1227)   

«مَا رَأَيْتُ رَسُولَ اللَّهِ ﷺ يُصَلِّي شَيْئًا مِنْ صَلَاةِ اللَّيْلِ جَالِسًا حَتَّى دَخَلَ فِي السِّنِّ فَجَعَلَ يَقْرَأُ فَإِذَا بَقِيَ عَلَيْهِ مِنَ السُّورَةِ ثَلَاثُونَ آيَةً أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَ ثُمَّ رَكَعَ»  

"I never saw the Messenger of Allah ﷺ pray sitting down until he grew old. Then he would pray sitting down and when there were thirty or forty verses left, he would stand up and recite them, then bow." (Using translation from Nasāʾī 1649)   

«كَانَ رَسُولُ اللَّهِ ﷺ لَا يَقْرَأُ فِي صَلَاتِهِ جَالِسًا حَتَّى دَخَلَ فِي السِّنِّ فَكَانَ يَقْرَأُ وَهُوَ جَالِسٌ فَإِذَا بَقِيَ عَلَيْهِ مِنَ السُّورَةِ ثَلَاثُونَ آيَةً أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَهَا ثُمَّ رَكَعَ»