Sahih Bukhari
Judgments (Ahkaam)
Volume: 009 / Book Number: 089 / Hadith Number: 310
Narrated 'Abdullah bin Dinar:
I witnessed Ibn 'Umar when the people gathered around 'Abdul Malik. Ibn 'Umar wrote: I gave the Pledge of allegiance that I will listen to and obey Allah's Slave, 'Abdul Malik, Chief of the believers according to Allah's Laws and the Traditions of His Apostle as much as I can; and my sons too, give the same pledge.'