Musnad Ahmad 33:603

Musa narrated to us, Ibn Lahi'ah narrated to us, from Abu al-Zubayr, from Jabir, that he heard the Prophet, peace and blessings of Allah be upon him, saying: "A group of my Ummah will continue to fight for the truth, prevailing until the Day of Resurrection." He said: "Then 'Isa ibn Maryam will descend, and their leader will say: 'Come, lead us in prayer.' He will say: 'No, some of you are leaders over others, as an honor from Allah to this Ummah.'"