Al-Adab Al-Mufrad, Book 34, Hadith 813 (English) ⓘ

Ibn 'Abbas said, "The Prophet of Allah, may Allah bless him and grant him peace, came forward swiftly while we were sitting, He approached in such a manner that we wee alarmed by the speed with which he came towards us. When he reached us, he greeted us and said, 'I came swiftly to you to tell you about the Night of Power. I forgot it in the time it took me to get to you, so look for it in the last ten nights (of Ramadan).'"

حَدَّثَنَا إِسْحَاقُ، قَالَ‏:‏ أَخْبَرَنَا جَرِيرٌ، عَنْ قَابُوسَ، عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ قَالَ‏:‏ أَقْبَلَ نَبِيُّ اللهِ صلى الله عليه وسلم مُسْرِعًا وَنَحْنُ قُعُودٌ، حَتَّى أَفْزَعَنَا سُرْعَتُهُ إِلَيْنَا، فَلَمَّا انْتَهَى إِلَيْنَا سَلَّمَ، ثُمَّ قَالَ‏:‏ قَدْ أَقْبَلْتُ إِلَيْكُمْ مُسْرِعًا، لِأُخْبِرَكُمْ بِلَيْلَةِ الْقَدْرِ، فَنَسِيتُهَا فِيمَا بَيْنِي وَبَيْنَكُمْ، فَالْتَمِسُوهَا فِي الْعَشْرِ الأوَاخِرِ‏.‏