What do you think of two whose third is Allah
Abu Bakr As-Siddiq (radi Allahu anhu) said, when the Messenger of Allah (sal Allahu alaihi wa sallam) 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 (sal Allahu alaihi wa sallam) said, “O Abu Bakr! What do you think of two whose third is Allah.”
[Sahih al-Bukhari and Muslim]
This incident occurred when the Prophet (sal Allahu alaihi wa sallam) was emigrating from Makkah to Al-Madinah with Abu Bakr As-Siddiq (radi Allahu anhu). The disbelievers had announced a huge reward for their arrest for which people were searching them wildly. In the course of their search, some of them reached the mouth of the cave of Thaur where the Prophet (sal Allahu alaihi wa sallam) and Abu Bakr (radi Allahu anhu) were staying for refuge and rest. This Hadith describes the valour, fearlessness and unlimited confidence and trust of the Prophet (sal Allahu alaihi wa sallam) in Allah; it also indicates how Allah helps His favourites. See Verse (40:51) of the Qur’an in this regard.
And Allah Knows Best!