many of the bedouin arabs came with excuses seeking leave to stay behind. thus those who were false to allah and his messenger in their covenant remained behind. a painful chastisement shall befall those of them that disbelieved.
وجاء المعذرون من الأعراب ليؤذن لهم وقعد الذين كذبوا الله ورسوله سيصيب الذين كفروا منهم عذاب أليم