It is narrated through the same chain that the Messenger of Allah (peace and blessings be upon him) said to Sayyiduna Ali (may Allah be pleased with him): "By the One in whose Hand is my soul, were it not for the danger that groups of my Ummah would say about you what the Christians said about Isa son of Maryam, I would say something about you today such that you would not pass by any Muslim without him taking the dust from your footprints for the sake of blessing."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 947