Musannaf Ibn Abi Shaybah 37223 — The words of Ali bin Abi Talib

It is narrated from Abu Ishaq that he said: Sayyiduna Ali (may Allah be pleased with him) said: "There are a few sayings such that if you were to drive your mounts in search of them, you would wear out and destroy the mounts before finding anything like them. A servant should hope in no one but his Lord. A servant should fear only his own sin. One who does not know should not be ashamed to learn. When a person is asked about something he does not know, he should not be ashamed to say: 'Allah knows best.' And know that the place of patience in faith is the same as the place of the head in the body. When the head is gone, the body is gone, and when patience is gone, faith is gone."