Sahih Muslim
Sahih Muslim 749d
وَحَدَّثَنِي أَبُو الرَّبِيعِ الزَّهْرَانِيُّ، حَدَّثَنَا حَمَّادٌ، حَدَّثَنَا أَيُّوبُ، وَبُدَيْلٌ، عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَجُلاً، سَأَلَ النَّبِيَّ صلى الله عليه وسلم وَأَنَا بَيْنَهُ وَبَيْنَ السَّائِلِ فَقَالَ يَا رَسُولَ اللَّهِ كَيْفَ صَلاَةُ اللَّيْلِ قَالَ " مَثْنَى مَثْنَى فَإِذَا خَشِيتَ الصُّبْحَ فَصَلِّ رَكْعَةً وَاجْعَلْ آخِرَ صَلاَتِكَ وِتْرًا " . ثُمَّ سَأَلَهُ رَجُلٌ عَلَى رَأْسِ الْحَوْلِ وَأَنَا بِذَلِكَ الْمَكَانِ مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم فَلاَ أَدْرِي هُوَ ذَلِكَ الرَّجُلُ أَوْ رَجُلٌ آخَرُ فَقَالَ لَهُ مِثْلَ ذَلِكَ .
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
'Abdullah ibn 'Umar reported that a man asked the Prophet (ﷺ) about the night prayer while I stood between him and the questioner. The Prophet (ﷺ) replied, “It is in pairs; when you fear dawn, pray one rak'ah and make the end of your prayer witr.” A year later, another man asked him while I was in the same place beside the Messenger of Allah (ﷺ). I do not know whether it was the same man or someone else, but he gave him the same answer.