Hadith 6129
وَعَنْ سَعْدٍ قَالَ: رَأَيْتُنِي وَأَنَا ثَالِثُ الْإِسْلَامِ وَمَا أَسْلَمَ أَحَدٌ إِلَّا فِي الْيَوْمِ الَّذِي أَسْلَمْتُ فِيهِ وَلَقَدْ مَكَثْتُ سَبْعَةَ أَيَّامٍ وَإِنِّي لثالث الْإِسْلَام. رَوَاهُ البُخَارِيّ
Sa'd said: I have seen myself as. the third member of Islam, no one having accepted it except on the day I did, and during the space of seven days I constituted a third of Islam. Bukhari transmitted it.