Usefulness in explaining the narration and expression of the vision. Some of them said that it is permissible at all times and returns from the sunrise to the time of meridian, and some of them said that it is not permissible without the sun, and some of them said from the rising of the sun to a benefit that should not cut the vision except on a crossing and it is obligatory for those who do not know knowledge The expression is that no one expresses a vision, then he is sinning for that because it is like a fatwa and in fact it is a valuable knowledge. What is mentioned in the hadith is the meaning that if a person does not know the answer and is silent about it, then he will be rewarded .