إِذْ جَعَلَ ٱلَّذِينَ كَفَرُوا۟ فِى قُلُوبِهِمُ ٱلْحَمِيَّةَ حَمِيَّةَ ٱلْجَـٰهِلِيَّةِ فَأَنزَلَ ٱللَّهُ سَكِينَتَهُۥ عَلَىٰ رَسُولِهِۦ وَعَلَى ٱلْمُؤْمِنِينَ وَأَلْزَمَهُمْ كَلِمَةَ ٱلتَّقْوَىٰ وَكَانُوٓا۟ أَحَقَّ بِهَا وَأَهْلَهَا ۚ وَكَانَ ٱللَّهُ بِكُلِّ شَىْءٍ عَلِيمًا
Iz ja'alal lazeena kafaroo fee quloobihimul hamiyyata hamiyyatal jaahiliyyati fa anzalal laahu sakeenatahoo 'alaa Rasoolihee wa 'alal mu mineena wa alzamahum kalimatat taqwaa wa kaanooo ahaqqa bihaa wa ahlahaa; wa kaanal laahu bikulli shai'in Aleema
While the disbelievers had fury in their hearts- the fury of ignorance- God sent His tranquillity down on to His Messenger and the believers and made binding on them [their] promise to obey God, for that was more appropriate and fitting for them. God has full knowledge of all things.
When those who denied set in their hearts a fierce partisanship — the partisanship of the age of ignorance — God sent down his tranquility upon his Messenger and upon the believers, and bound them to the word of mindful restraint, for they were the most deserving of it and worthy of it. And God is the Knower of all things.