Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:2:100 –

Is it not ˹true˺ that every time they took a covenant a party of them threw it away? But, ˹in fact˺, most of them do not believe.  

Why, whenever they make a covenant, with God that they will believe in the Prophet (s) when he appears, or that they will not give assistance to the idolaters against the Prophet (s), does a party of them reject it?, cast it away repudiating it (this is the response to the clause beginning with kullamā, the interrogative of rebuke). Nay (bal indicates a transition), but most of them are disbelievers.
القرآن:٢:١٠٠ –

أَوَكُلَّمَا عَاهَدُوا عَهْدًا نَبَذَهُ فَرِيقٌ مِنْهُمْ ۚ بَلْ أَكْثَرُهُمْ لَا يُؤْمِنُونَ  

{أو كلما عاهدوا} الله {عهداً} على الإيمان بالنبي إن خرج، أو النبيَّ أن لا يعاونوا عليه المشركين {نبذه} طرحه {فريق منهم} بنقضه، جواب كلما وهو محل الاستفهام الإنكاري {بل} للانتقال {أكثرهم لا يؤمنون}.