The cave associated with Muhammad’s first Quranic revelation during Ramadan is the Cave of Hira.
In Islamic tradition, Muhammad was about 40 years old when the angel Gabriel appeared to him during a retreat in the Cave of Hira near Mecca. The first revealed verses are traditionally identified as the opening verses of Quran chapter 96, Al-Alaq, beginning with the command to read or recite. The event is generally placed in 610 CE and is linked with Laylat al-Qadr, the Night of Power, although the exact date is disputed.
Hira is located on Jabal al-Nour, or the Mountain of Light. That relationship explains a frequent quiz mix-up: Hira is the cave, while Jabal al-Nour is the mountain containing it. Cave of Thawr is associated instead with Muhammad’s migration from Mecca to Medina, while the Cave of the Patriarchs and Cave of Machpelah are names associated with a site in Hebron.
The revelations continued for roughly 23 years, eventually forming the Quran.