Saeed bin Jubair (may Allah have mercy on him) says that once Sayyiduna Ibn Abbas (may Allah be pleased with them both) remembered the day of Thursday and said: What was the day of Thursday? Saying this, he began to weep until I saw tears flowing down his cheeks like a string of pearls. He said that the Prophet (peace and blessings of Allah be upon him) said: "Bring me writing materials, I will write something for you after which you will never go astray." People began to say: What has happened, can the Prophet (peace and blessings of Allah be upon him) also speak incoherently?
Hadith Referenceمسند احمد / ومن مسند بني هاشم / 3336