Umar entered upon the Messenger of Allah ﷺ while he was lying on a mat that had left its marks on his side. Umar said, "Prophet of Allah, why not take a softer bed than this?"He replied, "What have I to do with this world? My example and the example of this world is only like a rider who travels on a hot day, takes shelter under a tree for a moment of the day, then moves on and leaves it behind."
أن رسول الله ﷺ دخل عليه عمر، وهو على حصير قد أثر في جنبه، فقال: يا نبي الله، لو اتخذت فراشا أوثر من هذا؟ فقال: مالي وللدنيا، ما مثلي ومثل الدنيا إلا كراكب سار في يوم صائف فاستظل تحت شجرة ساعة من نهار، ثم راح فتركها.
Ahmad (2744) narrated it, and Ibn Hibban (6352) and Hakim (4/309) graded it sahih, all of them through Thabit bin Yazid, from Hilal bin Khabab, from Ikrima, from Ibn Abbas, who mentioned it.Its chain is hasan because of Hilal bin Khabab Abdi, for he is hasan al-hadith. As for the statement of Haythami in al-Majmu (10/326), "Ahmad narrated it, and its men are the men of the Sahih except for Hilal bin Khabab, who is trustworthy," this is not to be taken at face value, rather there is disagreement about him. This is why Ibn Adi mentioned him in al-Kamil and said, "I hope that there is no harm in him."Ibn Hibban mentioned him among the trustworthy narrators, then mentioned him again in al-Majruhin (1148) and said, "He was among those whose mind became confused in his later life, so he would narrate things based on supposition. It is not permissible to rely on him when he narrates alone, but as for what agrees with the trustworthy narrators, if someone relies on it, I hope he will not be faulted for doing so." This is what he said, but he did not clarify whether Thabit bin Yazid narrated from him before or after the confusion set in. However, its inclusion in the Sahih indicates that he narrated from him before the confusion.As for his statement, "something softer than this," it means gentler than this.