Only Allah has the right and the authority to declare a matter permissible or prohibited. This Quranic maxim makes it clear that human beings do not have absolute freedom over the resources made available to them by Allah. Our use of the resources is limited by the limits laid down by Allah.
Allah condemns an ancient Arab nation, Madian, for spending out of their wealth without any limits.
“They said: “O Shu’aib! Does thy (religion of) prayer command thee that we leave off the worship which our fathers practised, or that we leave off doing what we like with our property?” (Qur’an 11: 87)
Furthermore, Allah deems it a lie on Him for a human being to declare lawful what is not and vice versa. He states in the Book:
“But say not – for any false thing that your tongues may put forth,- “This is lawful, and this is forbidden,” so as to ascribe false things to Allah. For those who ascribe false things to Allah, will never prosper.” (Qur’an 16: 116)
Only Allah and, by His permission, His messenger have the right to declare something permissible or prohibited.
“Those who follow the messenger, the unlettered Prophet, whom they find mentioned in their own (scriptures),- in the law and the Gospel;- for he commands them what is just and forbids them what is evil; he allows them as lawful what is good (and pure) and prohibits them from what is bad (and impure); He releases them from their heavy burdens and from the yokes that are upon them.” (Qur’an 7: 157)
Sources: Mawdudi, Abul Ala. Muashiat-e-Islam. 11th ed. Karachi: Ma’araf Islami, 1986. 71-72.