Sahih Muslim Book - 25, Hadith - 4233

حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ أَخْبَرَنَا وَكِيعٌ عَنْ مَالِكِ بْنِ مِغْوَلٍ عَنْ طَلْحَةَ بْنِ مُصَرِّفٍ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ أَنَّهُ قَالَ يَوْمُ الْخَمِيسِ وَمَا يَوْمُ الْخَمِيسِ. ثُمَّ جَعَلَ تَسِيلُ دُمُوعُهُ حَتَّى رَأَيْتُ عَلَى خَدَّيْهِ كَأَنَّهَا نِظَامُ اللُّؤْلُؤِ. قَالَ قَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « ائْتُونِى بِالْكَتِفِ وَالدَّوَاةِ - أَوِ اللَّوْحِ وَالدَّوَاةِ - أَكْتُبْ لَكُمْ كِتَابًا لَنْ تَضِلُّوا بَعْدَهُ أَبَدًا ». فَقَالُوا إِنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- يَهْجُرُ.

It was narrated from Sa'd bin Jubair that Ibn 'Abbas said: "Thursday and what a Thursday!" Then his tears started to flow until I saw what looked like strings of pearls on his cheeks. He said: "The Messenger of Allah (s.a.w) said: 'Bring me a shoulder blade and an inkpot' - or 'a tablet and an inkpot' - and I will dictate for you a document after which you will never go astray.' They said: 'The Messenger of Allah (s.a.w) is in a state of delirium.'"