Musannaf Ibn Abi Shaybah 11118 — Reports on the reward for fever

Iyad bin Ghutayf said: We went to visit Sayyiduna Abu Ubaydah bin al-Jarrah (may Allah be pleased with him) when he was ill. His face was turned towards the wall, and his wife was sitting by his head. I said: "How did Abu Ubaydah spend the night?" His wife said: "He spent the night in a state of reward." Sayyiduna Abu Ubaydah turned towards us and said: "I did not spend the night earning reward; but whoever Allah Almighty tests with some hardship, that hardship becomes a means of his sins falling away."