Sahih Muslim 1762
صحيح مسلم#1762Sahihوَحَدَّثَنَا ابْنُ الْمُثَنَّى، وَابْنُ، بَشَّارٍ قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ أَنَسِ بْنِ سِيرِينَ، قَالَ سَأَلْتُ ابْنَ عُمَرَ . بِمِثْلِهِ وَزَادَ وَيُوتِرُ بِرَكْعَةٍ مِنْ آخِرِ اللَّيْلِ . وَفِيهِ فَقَالَ بَهْ بَهْ إِنَّكَ لَضَخْمٌ .
Anas b. Sirin reported:I asked Ibn 'Umar like this (as recorded in the previous hadith) and he made this addition:" And he (the Holy Prophet) made the end of the night prayer as odd number by one rak'ah." And there is also (this addition):" Stop, stop, you are bulky
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 6:191