Sayyiduna al-Miqdam (may Allah be pleased with him) said: I heard the Prophet (peace and blessings be upon him) say: "No man is placed in authority over a people except that he will come on the Day of Resurrection leading them, carrying a banner in front of him, and they will follow him; then he will be asked about them and they will be asked about him."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17786