Abu Bakr As-Siddiq (May Allah bepleased with him) said:
When Messenger of Allah ﷺ and I were in the cave of Thaur and I saw the feet of the polytheists who were above us at the mouth of the cave (on the eve of the Emigration), I submitted: "O Messenger of Allah! If one of them were to look down below his feet, he would see us". He ﷺ said, "O Abu Bakr! What do you think of two whose third is Allah".

[Al-Bukhari and Muslim].

الثامن: عن أبي بكر الصديق رضي الله عنه عن عبد الله بن عثمان بن عامر بن عمر بن كعب بن سعد بن تيم بن مرة بن كعب بن لؤي بن غالب القرشي التيمي رضي الله عنه - وهو وأبوه وأمه صحابة، رضي الله عنهم- قال: نظرت إلى أقدام المشركين ونحن في الغار وهم على رؤوسنا فقلت يارسول الله لو أن أحدهم نظر تحت قدمية لأبصرنا. فقال: " ما ظنك يا أبا بكر باثنين الله ثالثهما" ((متفق عليه)) .