Muhammad is significant to religion.
The Farewell Pilgrimage ( Arabic : حجة الوداع ) was the last and only Hajj pilgrimage Muhammad , prophet of Islam , participated in 632 CE ( 10 AH ) . Muhammad . Periodically , he would seclude himself in a mountain cave named Hira for several nights of prayer ; later , at age 40 , he reported being visited by Gabriel in the cave , where he stated he received his first revelation from God .