The First Revelation — Cave Hira
Age 40 · 610 CEThe very beginning of prophethood: Jibril ؑ came to him in the cave of Hira and brought the first words of the Qur'an Majeed.
أَوَّلُ مَا بُدِئَ بِهِ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مِنَ الْوَحْيِ الرُّؤْيَا الصَّالِحَةُ فِي النَّوْمِ... ثُمَّ حُبِّبَ إِلَيْهِ الْخَلَاءُ، وَكَانَ يَخْلُو بِغَارِ حِرَاءٍ، فَجَاءَهُ الْمَلَكُ فَقَالَ: اقْرَأْ، قَالَ: مَا أَنَا بِقَارِئٍ
The first of revelation that came to the Messenger of Allah ﷺ was true dreams in sleep… Then solitude was made dear to him, and he would withdraw to the cave of Hira. The angel came to him and said: "Read!" He said: "I am not one who reads."