Sunan Ibn Majah, Hadith 133 ⓘ
It was narrated that Sa'eed bin Zaid bin 'Amr bin Nufail said: "The Messenger of Allah was one of the Ten (given glad tidings of Paradise). He said: 'Abu Bakr will be in Paradise; 'Umar will be in Paradise; 'Uthman will be in Paradise; 'Ali will be in Paradise; Talhah will be in Paradise; Zubair will be in Paradise; Sa'd will be in Paradise; 'Abdur-Rahman will be in Paradise." He was asked: 'Who will be the ninth?' He said: 'I will.'"
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا عِيسَى بْنُ يُونُسَ، حَدَّثَنَا صَدَقَةُ بْنُ الْمُثَنَّى أَبُو الْمُثَنَّى النَّخَعِيُّ، عَنْ جَدِّهِ، رِيَاحِ بْنِ الْحَارِثِ سَمِعَ جَدَّهُ، سَعِيدَ بْنَ زَيْدِ بْنِ عَمْرِو بْنِ نُفَيْلٍ يَقُولُ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ عَاشِرَ عَشَرَةٍ فَقَالَ " أَبُو بَكْرٍ فِي الْجَنَّةِ وَعُمَرُ فِي الْجَنَّةِ وَعُثْمَانُ فِي الْجَنَّةِ وَعَلِيٌّ فِي الْجَنَّةِ وَطَلْحَةُ فِي الْجَنَّةِ وَالزُّبَيْرُ فِي الْجَنَّةِ وَسَعْدٌ فِي الْجَنَّةِ وَعَبْدُ الرَّحْمَنِ فِي الْجَنَّةِ " . فَقِيلَ لَهُ مَنِ التَّاسِعُ قَالَ أَنَا .
also referenced under: Book 1, Hadith 138 (In-Book) & Volume 1, Book 1, Hadith 133 (DarusSalam)