From Sahih Muslim (Hadith 3285):
Salim (b. Abdullah b. 'Umar) reported on the authority of his father (Allah be pleased with them) that Allah's Apostle (ﷺ) 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
Reference: Muslim 3285