It is narrated from Abdullah bin Dinar that Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: When we pledged allegiance to the Messenger of Allah (peace and blessings be upon him) to listen and obey, he (peace and blessings be upon him) would say (with kindness and mercy): "As much as you are able."

It is narrated from Ummaymah bint Ruqaiqah that she said: I came to the Messenger of Allah, peace and blessings be upon him, among many women who had come to pledge allegiance to Islam. Those women said: O Messenger of Allah, peace and blessings be upon him! We pledge allegiance to you that we will not associate anything with Allah, nor will we steal, nor will we commit adultery, nor will we kill our children, nor will we bring a false accusation upon anyone from ourselves, nor will we disobey you in any lawful matter. The Messenger of Allah, peace and blessings be upon him, (with utmost kindness and love) said: "As much as you are able or have the power to do." The women said: O Messenger of Allah, peace and blessings be upon him! Allah and His Messenger are more merciful to us than we are to ourselves. Come, let us shake hands with you. The Messenger of Allah, peace and blessings be upon him, said: "I do not shake hands with women. My saying is to a hundred women as it is to one woman."

It is narrated from Abdullah bin Dinar that Sayyiduna Abdullah bin Umar, may Allah be pleased with them both, wrote a pledge of allegiance to Abdul Malik bin Marwan with the following content: In the name of Allah, the Most Gracious, the Most Merciful. Peace be upon you, O Abdul Malik bin Marwan, the servant of Allah, who is the ruler of the Muslims. I praise Allah, besides whom there is no true deity, and I acknowledge to listen to you and obey you according to the command of Allah, the Glorious and Majestic, and according to the Sunnah of His Messenger, peace and blessings be upon him, as far as I am able.