[Machine] The Messenger of Allah ﷺ said, "The night prayer is (to be performed in) pairs, pairs. But if you fear the coming of dawn, then perform one rakaah (unit of prayer) for witr." I asked, "What is (meant by) pairs, pairs?" He said, "Two rakaahs, two rakaahs."
قَالَ رَسُولُ اللهِ ﷺ صَلَاةُ اللَّيْلِ مَثْنَى مَثْنَى فَإِنْ خَشِيتَ الصُّبْحَ فَأَوْتِرْ بِرَكْعَةٍ قَالَ قُلْتُ مَا مَثْنَى مَثْنَى؟ قَالَ رَكْعَتَانِ رَكْعَتَانِ
The night prayer consists of pairs and when you see the approach of dawn, make this number odd by one rak'ah. It was said to Ibn 'Umar: What does the (word) pair imply? He said: (It means) that salutation is uttered after every two rak'ahs. (Using translation from Muslim 749i)
عَنْ رَسُولِ اللهِ ﷺ قَالَ صَلَاةُ اللَّيْلِ مَثْنَى مَثْنَى فَإِذَا رَأَيْتَ أَنَّ الصُّبْحَ يُدْرِكُكَ فَأَوْتِرْ بِوَاحِدَةٍ قَالَ فَقِيلَ لِابْنِ عُمَرَ مَا مَثْنَى مَثْنَى قَالَ تُسَلِّمُ فِي كُلِّ رَكْعَتَيْنِ
A man said, "O Messenger of Allah ﷺ! How is the prayer of the night?" He said, "Two rakʿat followed by two rakʿat and so on, and when you apprehend the approaching dawn, offer one rakʿa as witr." (Using translation from Bukhārī 1137)
عَنِ النَّبِيِّ ﷺ قَالَ «صَلَاةُ اللَّيْلِ مَثْنَى مَثْنَى فَإِذَا خِفْتَ الصُّبْحَ فَأَوْتِرْ بِرَكْعَةٍ»
A man said, "O Messenger of Allah ﷺ! How is the prayer of the night?" He said, "Two rakʿat followed by two rakʿat and so on, and when you apprehend the approaching dawn, offer one rakʿa as witr." (Using translation from Bukhārī 1137)
عَنِ النَّبِيِّ ﷺ قَالَ «صَلَاةُ اللَّيْلِ مَثْنَى مَثْنَى فَإِذَا خِفْتَ الصُّبْحَ فَأَوْتِرْ بِرَكْعَةٍ»