Silsilat al-Ahadith al-Sahihah

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) was sitting on a mat made of palm leaves and similar things, and its marks appeared on his side. Sayyiduna Umar (may Allah be pleased with him) came to him and said: O Messenger of Allah! If you could have a soft bedding made (it would be better)? The Prophet (peace and blessings be upon him) said: "What do I have to do with the world (and its comforts)? My example and the example of the world is like that of a rider who traveled on a hot day and (to rest) stayed for a short while in the shade of a tree, and then left it and moved on."