Narrated AbuDharr:

We fasted with the Messenger of Allah ﷺ during Ramadan, but he did not make us get up at night for prayer at any time during the month till seven nights remained; then he made us get up for prayer till a third of the night had passed. When the sixth remaining night came, he did not make us get up for prayer. When the fifth remaining night came, he made us stand in prayer till a half of the night had gone.

So I said: Messenger of Allah, I wish you had led us in supererogatory prayers during the whole of tonight.

He said: When a man prays with an imam till he goes he is reckoned as having spent a whole night in prayer. On the fourth remaining night he did not make us get up. When the third remaining night came, he gathered his family, his wives, and the people and prayed with us till we were afraid we should miss the falah (success).

I said: What is falah? He said: The meal before daybreak. Then he did not make us get up for prayer during the remainder of the month.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، أَخْبَرَنَا دَاوُدُ بْنُ أَبِي هِنْدٍ، عَنِ الْوَلِيدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ جُبَيْرِ بْنِ نُفَيْرٍ، عَنْ أَبِي ذَرٍّ، قَالَ صُمْنَا مَعَ رَسُولِ اللَّهِ ﷺ رَمَضَانَ فَلَمْ يَقُمْ بِنَا شَيْئًا مِنَ الشَّهْرِ حَتَّى بَقِيَ سَبْعٌ فَقَامَ بِنَا حَتَّى ذَهَبَ ثُلُثُ اللَّيْلِ فَلَمَّا كَانَتِ السَّادِسَةُ لَمْ يَقُمْ بِنَا فَلَمَّا كَانَتِ الْخَامِسَةُ قَامَ بِنَا حَتَّى ذَهَبَ شَطْرُ اللَّيْلِ فَقُلْتُ يَا رَسُولَ اللَّهِ لَوْ نَفَّلْتَنَا قِيَامَ هَذِهِ اللَّيْلَةِ . قَالَ فَقَالَ " إِنَّ الرَّجُلَ إِذَا صَلَّى مَعَ الإِمَامِ حَتَّى يَنْصَرِفَ حُسِبَ لَهُ قِيَامُ لَيْلَةٍ " . قَالَ فَلَمَّا كَانَتِ الرَّابِعَةُ لَمْ يَقُمْ فَلَمَّا كَانَتِ الثَّالِثَةُ جَمَعَ أَهْلَهُ وَنِسَاءَهُ وَالنَّاسَ فَقَامَ بِنَا حَتَّى خَشِينَا أَنْ يَفُوتَنَا الْفَلاَحُ . قَالَ قُلْتُ مَا الْفَلاَحُ قَالَ السُّحُورُ ثُمَّ لَمْ يَقُمْ بِنَا بَقِيَّةَ الشَّهْرِ .