Sahih al-Bukhari 7202

Arabic

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ كُنَّا إِذَا بَايَعْنَا رَسُولَ اللَّهِ صلى الله عليه وسلم عَلَى السَّمْعِ وَالطَّاعَةِ يَقُولُ لَنَا ‏ "‏ فِيمَا اسْتَطَعْتَ ‏"‏‏.‏

Translation

Narrated `Abdullah bin `Umar:Whenever we gave the Pledge of allegiance to Allah's Messenger (ﷺ) for to listen to and obey, he used to say to us, for as much as you can

Authenticity

Sahih

Reference