Musannaf Ibn Abi Shaybah

It is narrated about Hazrat Hudhaifa (may Allah be pleased with him) that he said: There were many days when, if death had come to me, I would not have doubted. But today, there are many such things that I do not know about being among them, and he advised Hazrat Abu Mas'ud. He said: Hold fast to what you know and avoid fickleness in the religion of God.