Principle: Whoever specifies any of the rulings of the Shari'ah must provide evidence.

The Shaykh : The legal principle is that specifying rulings requires a definitive text and explicit evidence. This is also a principle that a student of knowledge should understand: whoever specifies something must provide what? He must establish the evidence. If someone were to say, for example, that a woman's menstruation is limited to one day and night in the minimum and fifteen days in the maximum, we would say to him: bring the evidence for this. If he does not bring evidence, the specification is invalid, because specifying the rulings of the Shari'ah means adding an extra description to the general term, and adding an extra description to the general term requires evidence. If someone were to ask: Why did you limit the need of the poor and the needy regarding what they are entitled to from zakah to one year? Why don't you say we give them enough for ten years? The answer to this is: Since zakah is repeated every year, it became appropriate to limit their sufficiency to one year. Because if we give them for one year and what we gave them ends when the year is complete, then when the second year of zakah arrives, they are given from the new zakah that came in the second lunar year, and so on.