The Enemy turns back from the Cave of Thaur
The enemy followed the Holy Prophet (sa) and when they reached the mountain where the Cave Thaur was located, the person who was searching their tracks said, “I cannot tell where these two individuals went from here.” When they reached near the cave, he said, “By God! The person you are pursuing did not go beyond this point.”
(Tarikh al-Khamis, Vol. 2, p. 15, fi Waqai‘ al-Sanah al-Ula min al-Hijrah, Dar al-Kutub al-Ilmiyyah, Beirut, 2009)
When the person searching the tracks uttered these words at the entrance of the cave, and at this point someone even wanted to take a look inside the cave, Umayya bin Khalaf said in a rather harsh and careless manner, “I have seen this web and tree here even before Muhammad (sa) was born. You must have lost your mind. How could he be here? Let us leave this place and look for him elsewhere.”
Having said this, the people returned.
(Allama Qastallani, Al-Mawahib al-Laduniyyah, Vol. 1, pp. 292-293, Al-Maktabah al-Islami, Beirut, 2004)