We gave the oath of allegiance to Messenger of Allah ﷺ that we would listen to and obey him both at the time when we were active and at the time when we were tired and that we would not fight against the ruler or disobey him, and would stand firm for the truth or say the truth wherever we might be, and in the Way of Allah we would not be afraid of the blame of the blamers. (See Hadith No. 178 and 320)  

بَايَعْنَا رَسُولَ اللَّهِ ﷺ عَلَى السَّمْعِ وَالطَّاعَةِ فِي الْمَنْشَطِ وَالْمَكْرَهِ وَأَنْ لاَ نُنَازِعَ الأَمْرَ أَهْلَهُ وَأَنْ نَقُومَ أَوْ نَقُولَ بِالْحَقِّ حَيْثُمَا كُنَّا لاَ نَخَافُ فِي اللَّهِ لَوْمَةَ لاَئِمٍ  

The Prophet ﷺ went out on a cold morning while the Muhajirin (emigrants) and the Ansar were digging the trench. The Prophet ﷺ then said, "O Allah! The real goodness is the goodness of the Here after, so please forgive the Ansar and the Muhajirin." They replied, "We are those who have given the Pledge of allegiance to Muhammad for to observe Jihad as long as we remain alive."  

عَنْ أَنَسٍ ؓ خَرَجَ النَّبِيُّ ﷺ فِي غَدَاةٍ بَارِدَةٍ وَالْمُهَاجِرُونَ وَالأَنْصَارُ يَحْفِرُونَ الْخَنْدَقَ فَقَالَ اللَّهُمَّ إِنَّ الْخَيْرَ خَيْرُ الآخِرَهْ فَاغْفِرْ لِلأَنْصَارِ وَالْمُهَاجِرَهْ فَأَجَابُوا نَحْنُ الَّذِينَ بَايَعُوا مُحَمَّدَا عَلَى الْجِهَادِ مَا بَقِينَا أَبَدَا  

Whenever we gave the Pledge of allegiance to Messenger of Allah ﷺ for to listen to and obey, he used to say to us, for as much as you can."  

كُنَّا إِذَا بَايَعْنَا رَسُولَ اللَّهِ ﷺ عَلَى السَّمْعِ وَالطَّاعَةِ يَقُولُ لَنَا فِيمَا اسْتَطَعْتَ  

I witnessed Ibn ʿUmar when the people gathered around ʿAbdul Malik. Ibn ʿUmar wrote: I gave the Pledge of allegiance that I will listen to and obey Allah's Slave, ʿAbdul Malik, Chief of the believers according to Allah's Laws and the Traditions of His Apostle as much as I can; and my sons too, give the same pledge.'  

بِالسَّمْعِ وَالطَّاعَةِ لِعَبْدِ الْمَلِكِ أَمِيرِ الْمُؤْمِنِينَ عَلَى سُنَّةِ اللَّهِ وَسُنَّةِ رَسُولِهِ مَا اسْتَطَعْتُ وَإِنَّ بَنِيَّ قَدْ أَقَرُّوا بِمِثْلِ ذَلِكَ  

I gave the Pledge of allegiance to the Prophet ﷺ that I would listen and obey, and he told me to add: 'As much as I can, and will give good advice to every Muslim.'  

بَايَعْتُ النَّبِيَّ ﷺ عَلَى السَّمْعِ وَالطَّاعَةِ فَلَقَّنَنِي فِيمَا اسْتَطَعْتُ وَالنُّصْحِ لِكُلِّ مُسْلِمٍ  

When the people took the oath of allegiance to ʿAbdul Malik, ʿAbdullah bin ʿUmar wrote to him: "To Allah's Slave, ʿAbdul Malik, Chief of the believers, I give the Pledge of allegiance that I will listen to and obey Allah's Slave, ʿAbdul Malik, Chief of the believers, according to Allah's Laws and the Traditions of His Apostle in whatever is within my ability; and my sons too, give the same pledge."  

بِالسَّمْعِ وَالطَّاعَةِ لِعَبْدِ اللَّهِ عَبْدِ الْمَلِكِ أَمِيرِ الْمُؤْمِنِينَ عَلَى سُنَّةِ اللَّهِ وَسُنَّةِ رَسُولِهِ فِيمَا اسْتَطَعْتُ وَإِنَّ بَنِيَّ قَدْ أَقَرُّوا بِذَلِكَ  

I said to Salama, "For what did you give the Pledge of allegiance to the Prophet ﷺ on the Day of Hudaibiya?" He replied, "For death."  

قُلْتُ لِسَلَمَةَ عَلَى أَىِّ شَىْءٍ بَايَعْتُمُ النَّبِيَّ ﷺ يَوْمَ الْحُدَيْبِيَةِ قَالَ عَلَى الْمَوْتِ  

The group of people whom ʿUmar had selected as candidates for the Caliphate gathered and consulted each other. ʿAbdur-Rahman said to them, "I am not going to compete with you in this matter, but if you wish, I would select for you a caliph from among you." So all of them agreed to let ʿAbdur-Rahman decide the case. So when the candidates placed the case in the hands of ʿAbdur-Rahman, the people went towards him and nobody followed the rest of the group nor obeyed any after him. So the people followed ʿAbdur-Rahman and consulted him all those nights till there came the night we gave the oath of allegiance to ʿUthman. Al-Miswar (bin Makhrama) added: ʿAbdur-Rahman called on me after a portion of the night had passed and knocked on my door till I got up, and he said to me, "I see you have been sleeping! By Allah, during the last three nights I have not slept enough. Go and call Az-Zubair and Saʿd.' So I called them for him and he consulted them and then called me saying, 'Call ʿAli for me." I called ʿAli and he held a private talk with him till very late at night, and then 'Al, got up to leave having had much hope (to be chosen as a Caliph) but ʿAbdur-Rahman was afraid of something concerning ʿAli. ʿAbdur-Rahman then said to me, "Call ʿUthman for me." I called him and he kept on speaking to him privately till the Mu'adh-dhin put an end to their talk by announcing the Adhan for the Fajr prayer. When the people finished their morning prayer and that (six men) group gathered near the pulpit, ʿAbdur-Rahman sent for all the Muhajirin (emigrants) and the Ansar present there and sent for the army chief who had performed the Hajj with ʿUmar that year. When all of them had gathered, ʿAbdur- Rahman said, "None has the right to be worshipped but Allah," and added, "Now then, O ʿAli, I have looked at the people's tendencies and noticed that they do not consider anybody equal to ʿUthman, so you should not incur blame (by disagreeing)." Then ʿAbdur-Rahman said (to ʿUthman), "I gave the oath of allegiance to you on condition that you will follow Allah's Laws and the traditions of Allah's Apostle and the traditions of the two Caliphs after him." So ʿAbdur-Rahman gave the oath of allegiance to him, and so did the people including the Muhajirin (emigrants) and the Ansar and the chiefs of the army staff and all the Muslims.  

أَنَّ الرَّهْطَ الَّذِينَ وَلاَّهُمْ عُمَرُ اجْتَمَعُوا فَتَشَاوَرُوا قَالَ لَهُمْ عَبْدُ الرَّحْمَنِ لَسْتُ بِالَّذِي أُنَافِسُكُمْ عَلَى هَذَا الأَمْرِ وَلَكِنَّكُمْ إِنْ شِئْتُمُ اخْتَرْتُ لَكُمْ مِنْكُمْ فَجَعَلُوا ذَلِكَ إِلَى عَبْدِ الرَّحْمَنِ فَلَمَّا وَلَّوْا عَبْدَ الرَّحْمَنِ أَمْرَهُمْ فَمَالَ النَّاسُ عَلَى عَبْدِ الرَّحْمَنِ حَتَّى مَا أَرَى أَحَدًا مِنَ النَّاسِ يَتْبَعُ أُولَئِكَ الرَّهْطَ وَلاَ يَطَأُ عَقِبَهُ وَمَالَ النَّاسُ عَلَى عَبْدِ الرَّحْمَنِ يُشَاوِرُونَهُ تِلْكَ اللَّيَالِيَ حَتَّى إِذَا كَانَتِ اللَّيْلَةُ الَّتِي أَصْبَحْنَا مِنْهَا فَبَايَعْنَا عُثْمَانَ قَالَ الْمِسْوَرُ طَرَقَنِي عَبْدُ الرَّحْمَنِ بَعْدَ هَجْعٍ مِنَ اللَّيْلِ فَضَرَبَ الْبَابَ حَتَّى اسْتَيْقَظْتُ فَقَالَ أَرَاكَ نَائِمًا فَوَاللَّهِ مَا اكْتَحَلْتُ هَذِهِ اللَّيْلَةَ بِكَبِيرِ نَوْمٍ انْطَلِقْ فَادْعُ الزُّبَيْرَ وَسَعْدًا فَدَعَوْتُهُمَا لَهُ فَشَاوَرَهُمَا ثُمَّ دَعَانِي فَقَالَ ادْعُ لِي عَلِيًّا فَدَعَوْتُهُ فَنَاجَاهُ حَتَّى ابْهَارَّ اللَّيْلُ ثُمَّ قَامَ عَلِيٌّ مِنْ عِنْدِهِ وَهْوَ عَلَى طَمَعٍ وَقَدْ كَانَ عَبْدُ الرَّحْمَنِ يَخْشَى مِنْ عَلِيٍّ شَيْئًا ثُمَّ قَالَ ادْعُ لِي عُثْمَانَ فَدَعَوْتُهُ فَنَاجَاهُ حَتَّى فَرَّقَ بَيْنَهُمَا الْمُؤَذِّنُ بِالصُّبْحِ فَلَمَّا صَلَّى لِلنَّاسِ الصُّبْحَ وَاجْتَمَعَ أُولَئِكَ الرَّهْطُ عِنْدَ الْمِنْبَرِ فَأَرْسَلَ إِلَى مَنْ كَانَ حَاضِرًا مِنَ الْمُهَاجِرِينَ وَالأَنْصَارِ وَأَرْسَلَ إِلَى أُمَرَاءِ الأَجْنَادِ وَكَانُوا وَافَوْا تِلْكَ الْحَجَّةَ مَعَ عُمَرَ فَلَمَّا اجْتَمَعُوا تَشَهَّدَ عَبْدُ الرَّحْمَنِ ثُمَّ قَالَ أَمَّا بَعْدُ يَا عَلِيُّ إِنِّي قَدْ نَظَرْتُ فِي أَمْرِ النَّاسِ فَلَمْ أَرَهُمْ يَعْدِلُونَ بِعُثْمَانَ فَلاَ تَجْعَلَنَّ عَلَى نَفْسِكَ سَبِيلاً فَقَالَ أُبَايِعُكَ عَلَى سُنَّةِ اللَّهِ وَرَسُولِهِ وَالْخَلِيفَتَيْنِ مِنْ بَعْدِهِ فَبَايَعَهُ عَبْدُ الرَّحْمَنِ وَبَايَعَهُ النَّاسُ الْمُهَاجِرُونَ وَالأَنْصَارُ وَأُمَرَاءُ الأَجْنَادِ وَالْمُسْلِمُونَ