Hadith 5574
Mishkat al-Masabih
Events of the Day of Resurrection and the Beginning of Creation · The Pond and the Intercession - Section 1
Arabic
عَنْ أَبِي هُرَيْرَةَ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: " أَسْعَدُ النَّاسِ بِشَفَاعَتِي يَوْمَ الْقِيَامَةِ مَنْ قَالَ: لَا إِلَهَ إِلَّا اللَّهُ خَالِصا من قلبه أونفسه " رَوَاهُ البُخَارِيّ
English translation
Abu Huraira reported the Prophet (ﷺ) as saying, "The one who will be most fortunate by reason of my intercession on the day of resurrection will be the one who says there is no god but God sincerely from his heart," or, "his soul." Bukhari transmitted it.