Sahih Muslim | Book 7 | Hadith Number 3123

Narrated by Salim (b. Abdullah b. 'Umar)
Salim (b. Abdullah b. 'Umar) reported on the authority of his father (Allah be pleased with them) that Allah's Apostle (may peace be upon him) was visited by (someone, i.e. an angel) during the fag end of the night at Dhu'l-Hulaifa, and it was said to him: Verily it is a blessed stony-ground.