The Messenger of Allah ﷺ said, "Whoever pledges allegiance to a leader, giving him the sincerity of his heart and the clasp of his hand, let him obey him to the best of his ability."
حدثنا وكيع حدثنا الأعمش عن زيد بن وهب عن عبد الرحمن بن عبد رب الكعبة
قال رسول الله ﷺ من بايع إماما فأعطاه ثمرة قلبه وصفقة يده فليطعه ما استطاع