﴿ يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لَا تَخُونُوا۟ ٱللَّهَ وَٱلرَّسُولَ وَتَخُونُوٓا۟ أَمَٰنَٰتِكُمْ وَأَنتُمْ تَعْلَمُونَ ﴾

“[Hence,] O you who have attained to faith, do not be false to God and the Apostle, and do not knowingly be false to the trust that has been reposed in you;”

(O ye who believe!) the address here is to Marwan and Abu Lubabah Ibn 'Abd al-Mundhir (Betray not Allah) in relation to Religion (and His messenger) by advising the Banu Qurayzah not to accept the judgement of Sa'd Ibn Mu'adh, (nor knowingly betray your trusts) nor betray the obligations of Allah which are your trusts.