It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) used to take the pledge from people that they would listen to the ruler and obey him. Then the Prophet (peace and blessings be upon him) himself would say: As much as you have strength and ability. One narrator said: Thus, the Prophet (peace and blessings be upon him) would prompt us and remind us that as much as you have strength (you will obey the ruler accordingly).