The Book of Faith
1/85. Chapter:
Regarding the saying of the Prophet (saws): "I will be the first of the people to intercede concerning Paradise, and I will be the Prophet with the Greatest Number of Followers."
Sahih Muslim
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، وَإِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ قُتَيْبَةُ حَدَّثَنَا جَرِيرٌ، عَنِ الْمُخْتَارِ بْنِ فُلْفُلٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَنَا أَوَّلُ النَّاسِ يَشْفَعُ فِي الْجَنَّةِ وَأَنَا أَكْثَرُ الأَنْبِيَاءِ تَبَعًا " .
Anas b. Malik reported: The Messenger of Allah (ﷺ) said: I would be the first among people to intercede in the Paradise and amongst the apostles I would have the largest following (on the Day of Resurrection).
Reference : Sahih Muslim 196aIn-book reference : Book 1, Hadith 389USC-MSA web (English) reference : Book 1, Hadith 381