"When we gave our pledge to the Messenger of Allah to hear and obey, he would say to us: 'In as much as you can". (Using translation from Nasāʾī 4188)
كُنَّا نُبَايِعُ رَسُولَ اللهِ ﷺ عَلَى السَّمْعِ وَالطَّاعَةِ وَيَقُولُ لَنَا «فِيمَا اسْتَطَعْتُمْ»