عَنْ أَنَسٍ رَضِيَ اللَّهُ عَنْهُ أَنَّ أَبَا بَكْرٍ رَضِيَ اللَّهُ عَنْهُ حَدَّثَهُ قَالَ قُلْتُ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ وَهُوَ فِي الْغَارِ وَقَالَ مَرَّةً وَنَحْنُ فِي الْغَارِ لَوْ أَنَّ أَحَدَهُمْ نَظَرَ إِلَى قَدَمَيْهِ لَأَبْصَرَنَا تَحْتَ قَدَمَيْهِ قَالَ فَقَالَ يَا أَبَا بَكْرٍ مَا ظَنُّكَ بِاثْنَيْنِ اللَّهُ ثَالِثُهُمَا
It is narrated from Sayyiduna Anas (may Allah be pleased with him) that Sayyiduna Abu Bakr (may Allah be pleased with him) said: I said to the Noble Prophet (peace and blessings be upon him), while we were in the cave, "If any one of them looks down towards his feet, he will see us beneath his feet." The Prophet (peace and blessings be upon him) said: "O Abu Bakr! What do you think about those two persons whose third is Allah, the Exalted?"