"We were with the Messenger of Allah ﷺ and he said: 'Will you not pledge to the Messenger of Allah ﷺ?' And he repeated it three times. So we stretched forth our hands to give our pledge. We said: 'O Messenger of Allah, we are willing to give you our pledge, but on what?' He said: 'That you will worship Allah and not associate anything with him, and (offer) the five daily prayers.' And he said, very quietly: 'And you will not ask the people for anything.'" (Using translation from Nasāʾī 460)  

كُنَّا عِنْدَ رَسُولِ اللهِ ﷺ فَقَالَ «أَلَا تُبَايِعُونَ رَسُولَ اللهِ ﷺ؟» فَرَدَّدَهَا ثَلَاثَ مَرَّاتٍ فَقَدَّمْنَا أَيْدِيَنَا فَبَايَعْنَا فَقُلْنَا يَا رَسُولَ اللهِ قَدْ بَايَعْنَاكَ فَعَلَامَ؟ قَالَ «عَلَى أَنْ تَعْبُدُوا اللهَ لَا تُشْرِكُوا بِهِ شَيْئًا وَالصَّلَوَاتِ الْخَمْسِ وَأَسَرَّ كَلِمَةً خَفِيَّةً لَا تَسْأَلُوا النَّاسَ شَيْئًا»