عَنْ سُفْيَانَ بْنِ عَبْدِ اللَّهِ الثَّقَفِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ حَدِّثْنِي بِأَمْرٍ أَعْتَصِمُ بِهِ (وَفِي لَفْظٍ مُرْنِي فِي الْإِسْلَامِ بِأَمْرٍ لَا أَسْأَلُ عَنْهُ أَحَدًا بَعْدَكَ) قَالَ قُلْ رَبِّيَ اللَّهُ (وَفِي لَفْظٍ آمَنْتُ بِاللَّهِ) ثُمَّ اسْتَقِمْ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ مَا أَخْوَفُ (وَفِي لَفْظٍ مَا أَكْبَرُ) مَا تَخَافُ عَلَيَّ (وَفِي لَفْظٍ فَأَيُّ شَيْءٍ أَتَّقِي) قَالَ فَأَخَذَ بِلِسَانِ نَفْسِهِ ثُمَّ قَالَ هَذَا
It is narrated from Sayyiduna Sufyan bin Abdullah Thaqafi (may Allah be pleased with him), he says: I said, "O Messenger of Allah! Tell me about such a deed related to Islam that I may hold fast to it and after you, I may not need to ask anyone about it." The Prophet (peace and blessings be upon him) said: "Say, 'My Lord is Allah,' and then remain steadfast upon it." I said, "O Messenger of Allah! What do you fear most for me?" In another narration: "From what should I guard myself?" The Prophet (peace and blessings be upon him) held his blessed tongue and said: "This."