﴿ هُوَ ٱلَّذِىٓ أَنزَلَ ٱلسَّكِينَةَ فِى قُلُوبِ ٱلْمُؤْمِنِينَ لِيَزْدَادُوٓا۟ إِيمَٰنًۭا مَّعَ إِيمَٰنِهِمْ ۗ وَلِلَّهِ جُنُودُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ ۚ وَكَانَ ٱللَّهُ عَلِيمًا حَكِيمًۭا ﴾

“It is He who from on high has bestowed inner peace upon the hearts of the believers, so that - seeing that God’s are all the forces of the heavens and the earth, and that God is all-knowing, truly wise - they might grow yet more firm in their faith;”

Here tranquillity (sakinah) means not becoming irritated despite provocation. At Hudaybiyyah the opponents of Islam tried to goad Muslims in different ways into taking such action as would provide them with sufficient justification for aggression. But the Muslims for their part tolerated every attempt at provocation. Right to the end, they were firm on the policy of overlooking and ignoring such attempts. Had God desired it, He could have subdued the forces of falsehood by means of His direct power and granted dominance to the Truth. Then, why is it that God created Hudaybiyyah Treaty-like conditions and made the Faithful undertake this journey? The purpose was to enhance the Faith by testing the Faithful. If a man curbs his urge to take revenge and enters into a treaty with an arrogant people simply because that is required by the task of disseminating the Truth, he does so by a conscientious decision. In so doing he makes his mind rule his heart. In this way, he increases his Faith-consciousness. He makes himself the recipient of such divine emotions as cannot be achieved in any other way. The advantage of this is that the people of Paradise and the people of Hell are separated in the process.