Surah Al-Baqarah 2:100

أَوَكُلَّمَا عَـٰهَدُوا۟ عَهْدًا نَّبَذَهُۥ فَرِيقٌ مِّنْهُم ۚ بَلْ أَكْثَرُهُمْ لَا يُؤْمِنُونَ

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.

Translation: Saheeh International

Tafsir

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 …

Excerpt from Tafsir al-Jalalayn, commentary on 2:100, via Quran.com. The reader has the full commentary and 9 more tafsirs.