Sayyiduna Abu Bakrah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Whoever honors the ruler (appointed) by Allah, Allah Almighty will honor him on the Day of Resurrection."
Hadith Referenceسلسله احاديث صحيحه / الحدود والمعاملات والاحكام / 1300