Musnad Ahmad

It is narrated from Hazrat Abu Usaib (may Allah be pleased with him) that once at night the Prophet (peace and blessings be upon him) left his house and, passing by me, called me as well. I accompanied him. Then he passed by Hazrat Abu Bakr and called him too, and he also joined. Then he passed by Hazrat Umar and called him too, and he also joined. Walking together, the Prophet (peace and blessings be upon him) entered the garden of an Ansari and said to the owner of the garden, "Serve us some ripe and unripe dates." He brought a bunch and placed it before the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) and his companions ate from it. Then the Prophet (peace and blessings be upon him) asked for cold water and drank it, and said, "On the Day of Resurrection, you will be questioned about this as well." Hearing this, Hazrat Umar picked up the bunch and struck it on the ground, scattering the dates, some of which went towards the Prophet (peace and blessings be upon him). Then he said, "O Messenger of Allah, will we be questioned about this too on the Day of Resurrection?" The Prophet (peace and blessings be upon him) said, "Yes, except for three things: a cloth with which a man covers his private parts, a piece of bread with which he satisfies his hunger, or a shelter in which he takes refuge from heat and cold."