The Messenger of Allah ﷺ said, "I will precede you to the Pool, and I will contend for some people but will be overcome regarding them. I will say, 'My Lord, my companions!' It will be said, 'You do not know what they introduced after you.'"
حدثنا أبو معاوية حدثنا الأعمش عن شقيق
قال رسول الله ﷺ أنا فرطكم على الحوض ولأنازعن أقواما ثم لأغلبن عليهم فأقول يا رب أصحابي فيقال إنك لا تدري ما أحدثوا بعدك
Its isnad is sahih. It is a repetition of 3629 with its isnad, and it has already appeared with other chains of transmission, the last of them being 3866.