Al-Maawardi said: “The king must know that the fulfilment of his covenants is a pillar on which his sovereignty rests; The breaking of covenants is a guilty quality, and it is even more culpable on the part of the king or sovereign and more damaging to him, because the sovereign, who is not trusted to fulfill his covenants, whose action does not correspond to his words and who is known to break his agreements and covenants , would have great difficulty in subjugating his people to his reign and there would be great dislike for him. [Tas-heel An-Nathar] The commitment is perhaps even more emphasized with regard to the father with his child and the chief with his people, so that they do not develop a dislike for him because he has broken his obligations, or therefore they do not take him as a bad example. A practical way not to fall into breaking promises is to attach the promise to the will of Allah. That is, saying, “In Sha Allah.” That a man breaks the promise made in `lam al-Tsar, that he violates his innate nature, he commits a greater sin. This fact has been emphasized in most ayats and traditions, and it is confirmed that respect for the state of Wajib is and should not be respected is Harim. It is also confirmed that the break-up of this first federation can lead to serious punishment. People are also warned about the harmful consequences of a default. Traditions also inform us that serious reprisals were made only for the violation of the first confederation, which is the greatest sin. That is why it is up to the people to fulfill their covenant, so that Allah (S.V.) may fulfill his promise. The third type of promise is when people make real alliances and agreements. Ayats and traditions say it`s Wajib to fulfill this kind of promise, and it`s Harim to go against them. But let`s get back to the bottom of this discussion – critics are trying to hold the Prophet Muhammad (his) responsible for the violation of the Treaty of Hudaibiyah.
The treaty contained a relatively common covenant clause that extended the peace agreement to the respective alliances of the various parties. So if a Muslim ally attacked an ally in Mecca, it would be considered a violation of the Treaty, and vice versa. Less than two years after the treaty was signed, an ally of Mecca, Banu Bakr, attacked a Muslim ally, Khuza`a, killing several of its men.  The other type of oath is the solemn oath or the vow. If you say something clearly and you swear to Allah, and in your heart, you say this oath to be solemn, then it will be sinner if you do not exhale (kafera) for it. It is a well-established fact that there are many Qur`anic verses and traditions that forbid the breaking of a promise and make it obligatory to fulfill the promise.