Musannaf Ibn Abi Shaybah 11115 — Reports on the reward for fever

It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "No one among the Muslims is afflicted with any hardship except that Allah Almighty gives a command to the angels. Then Allah Almighty says: Write for My servant the deeds he used to do while he was healthy (and which he now cannot do because of illness), as long as he remains bound in My fetter."