Chapter 44: The Book of Virtues
' Abdullah reported Allah' s Messenger (ﷺ) as saying; I shall be there at the Cistern before you, and I shall have to contend for some people, but I shall have to yield. I would be saying: My Lord, they are my friends, they are my friends, and it would be said: You don' t know what innovations they made after you.
Sahih Muslim 2297a