question #1 Sahih Muslim 1218d, Book 15, Hadith 162 : What is the significance of the Black Stone in Islamic rituals during the pilgrimage to Mecca?

Jabir b. Abdullah (Allah be pleased with them) reported that when Allah’s Messenger (ﷺ) proceeded to Mecca, he came to it (the Black Stone). he kissed it. and moved to his right. and moved quickly in three circuits, and walked in four circuits.