Abbas bin Mirdas reported,

It was narrated to him that the Messenger of Allah ﷺ prayed earnestly on the evening of Arafah for his community, asking for forgiveness and mercy. He multiplied his supplications, and Allah answered him, saying, "I have done so, and I have forgiven your community, except for those who have wronged one another."He said, "My Lord, You are able to forgive the wrongdoer and reward the wronged with something better than what was taken from him."That evening, however, nothing more came of this. When the next morning came, he supplicated again at Muzdalifa, repeating his prayer for his community. Soon the Prophet ﷺ smiled, and one of his companions asked, "Messenger of Allah, may my father and mother be ransomed for you, you have smiled at an hour when you do not usually smile. What has made you smile? May Allah keep you smiling."He answered, "I smiled at the enemy of Allah, Iblis. When he learned that Allah had answered my prayer for my community and had forgiven the wrongdoer, he fell to crying out in ruin and woe and pouring dust upon his head. His distress made me smile."

حدثنا عبد الله حدثني إبراهيم بن الحجاج الناجي قال حدثنا عبد القاهر بن السري قال حدثني ابن لكنانة بن عباس بن مرداس عن أبيه أن

أباه العباس بن مرداس

حدثه أن رسول الله ﷺ دعا عشية عرفة لأمته بالمغفرة والرحمة فأكثر الدعاء فأجابه الله عز وجل أن قد فعلت وغفرت لأمتك إلا من ظلم بعضهم بعضا فقال يا رب إنك قادر أن تغفر للظالم وتثيب المظلوم خيرا من مظلمته فلم يكن في تلك العشية إلا ذا فلما كان من الغد دعا غداة المزدلفة فعاد يدعو لأمته فلم يلبث النبي ﷺ أن تبسم فقال بعض أصحابه يا رسول الله بأبي أنت وأمي ضحكت في ساعة لم تكن تضحك فيها فما أضحكك أضحك الله سنك قال تبسمت من عدو الله إبليس حين علم أن الله عز وجل قد استجاب لي في أمتي وغفر للظالم أهوى يدعو بالثبور والويل ويحثو التراب على رأسه فتبسمت مما يصنع جزعه