48:10
إِنَّ ٱلَّذِينَ يُبَايِعُ ونَ كَ إِنَّ مَا يُبَايِعُ ونَ ٱللَّهَ يَدُ ٱللَّهِ فَوْقَ أَيْدِي هِمْ فَ مَن نَّكَثَ فَ إِنَّ مَا يَنكُثُ عَلَىٰ نَفْسِ هِۦ وَ مَنْ أَوْفَىٰ بِ مَا عَٰهَدَ عَلَيْ هُ ٱللَّهَ فَ سَ يُؤْتِي هِ أَجْرًا عَظِيمًا
Indeed, those who pledge allegiance to you, [O Muhammad] - they are actually pledging allegiance to Allah. The hand of Allah is over their hands. So he who breaks his word only breaks it to the detriment of himself. And he who fulfills that which he has promised Allah - He will give him a great reward.
48:18
لَّ قَدْ رَضِىَ ٱللَّهُ عَنِ ٱلْ مُؤْمِنِينَ إِذْ يُبَايِعُ ونَ كَ تَحْتَ ٱل شَّجَرَةِ فَ عَلِمَ مَا فِى قُلُوبِ هِمْ فَ أَنزَلَ ٱل سَّكِينَةَ عَلَيْ هِمْ وَ أَثَٰبَ هُمْ فَتْحًا قَرِيبًا
Certainly was Allah pleased with the believers when they pledged allegiance to you, [O Muhammad], under the tree, and He knew what was in their hearts, so He sent down tranquillity upon them and rewarded them with an imminent conquest
60:12
يَٰٓ أَيُّهَا ٱل نَّبِىُّ إِذَا جَآءَ كَ ٱلْ مُؤْمِنَٰتُ يُبَايِعْ نَ كَ عَلَىٰٓ أَن لَّا يُشْرِكْ نَ بِ ٱللَّهِ شَيْـًٔا وَ لَا يَسْرِقْ نَ وَ لَا يَزْنِي نَ وَ لَا يَقْتُلْ نَ أَوْلَٰدَ هُنَّ وَ لَا يَأْتِي نَ بِ بُهْتَٰنٍ يَفْتَرِي نَ هُۥ بَيْنَ أَيْدِي هِنَّ وَ أَرْجُلِ هِنَّ وَ لَا يَعْصِي نَ كَ فِى مَعْرُوفٍ فَ بَايِعْ هُنَّ وَ ٱسْتَغْفِرْ لَ هُنَّ ٱللَّهَ إِنَّ ٱللَّهَ غَفُورٌ رَّحِيمٌ
O Prophet, when the believing women come to you pledging to you that they will not associate anything with Allah, nor will they steal, nor will they commit unlawful sexual intercourse, nor will they kill their children, nor will they bring forth a slander they have invented between their arms and legs, nor will they disobey you in what is right - then accept their pledge and ask forgiveness for them of Allah. Indeed, Allah is Forgiving and Merciful.
9:111
إِنَّ ٱللَّهَ ٱشْتَرَىٰ مِنَ ٱلْ مُؤْمِنِينَ أَنفُسَ هُمْ وَ أَمْوَٰلَ هُم بِ أَنَّ لَ هُمُ ٱلْ جَنَّةَ يُقَٰتِلُ ونَ فِى سَبِيلِ ٱللَّهِ فَ يَقْتُلُ ونَ وَ يُقْتَلُ ونَ وَعْدًا عَلَيْ هِ حَقًّا فِى ٱل تَّوْرَىٰةِ وَ ٱلْ إِنجِيلِ وَ ٱلْ قُرْءَانِ وَ مَنْ أَوْفَىٰ بِ عَهْدِ هِۦ مِنَ ٱللَّهِ فَ ٱسْتَبْشِرُ وا۟ بِ بَيْعِ كُمُ ٱلَّذِى بَايَعْ تُم بِ هِۦ وَ ذَٰلِكَ هُوَ ٱلْ فَوْزُ ٱلْ عَظِيمُ
Indeed, Allah has purchased from the believers their lives and their properties [in exchange] for that they will have Paradise. They fight in the cause of Allah, so they kill and are killed. [It is] a true promise [binding] upon Him in the Torah and the Gospel and the Qur'an. And who is truer to his covenant than Allah? So rejoice in your transaction which you have contracted. And it is that which is the great attainment.