How do the people give the Bai'a to the Imam Sahih al-Bukhari 7202

Arabic hadith text
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ كُنَّاإِذَا 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."