Sahih al-Bukhari 7272
Sahih al-Bukhari · Book 96: Holding Fast to the Qur'an and Sunnah
Narrated `Abdullah bin Dinar:
حَدَّثَنَا إِسْمَاعِيلُ ، حَدَّثَنِي مَالِكٌ ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ ، كَتَبَ إِلَى عَبْدِ الْمَلِكِ بْنِ مَرْوَانَ يُبَايِعُهُ، وَأُقِرُّ لَكَ بِالسَّمْعِ وَالطَّاعَةِ عَلَى سُنَّةِ اللَّهِ وَسُنَّةِ رَسُولِهِ، فِيمَا اسْتَطَعْتُ.
`Abdullah Bin `Umar wrote to `Abdul Malik bin Marwan, swearing allegiance to him: 'I swear allegiance to you in that I will listen and obey what is in accordance with the Laws of Allah and the Tradition of His Apostle as much as I can.'