CERTAINTY H H 82 "When the Prophet, praise and peace be upon him, and I (Abu Bakr) were in the cave being tracked by the people of Mecca I saw their feet above us outside the cave and I said: 'Messenger of Allah, praise and peace be upon him, if one of them should happen to look down under his feet he would see us.' He replied: 'Abu Bakr, what would you think of two with whom Allah is the Third?'" R 82 Bukhari and Muslim with a chain up to Abu Bakr Siddique who related this.
81- الثامِنُ : عن أبي بكرٍ الصِّديق رضي الله عنه عبدِ اللهِ بنِ عثمان بنِ عامرِ بنِ عمر ابنِ كعب بنِ سعدِ بن تَيْم بنِ مرة بن كعبِ بن لُؤَيِّ بن غالب القرشي التيمي رضي الله عنه - وَهُوَ وَأَبُوهُ وَأُمُّهُ صَحَابَةٌ - - قَالَ : نَظَرتُ إِلَى أَقْدَامِ المُشْرِكينَ وَنَحنُ في الغَارِ وَهُمْ عَلَى رُؤُوسِنا ، فقلتُ : يَا رسولَ الله ، لَوْ أَنَّ أَحَدَهُمْ نَظَرَ تَحْتَ قَدَمَيهِ لأَبْصَرَنَا . فَقَالَ : "مَا ظَنُّكَ يَا أَبا بَكرٍ باثنَيْنِ الله ثَالِثُهُمَا" مُتَّفَقٌ عَلَيهِ .