Principle Sixty-Five: The Qur’an directs us to forbid even a lawful matter when it leads to neglecting an obligation or committing a sin.
This principle occurs in several places in the Qur’an and lies under the broader maxim, “The means share the ruling of their ends.”(1)
Among its proofs are His words: “Do not revile those whom they invoke beside Allah, lest they revile Allah in hostility, without knowledge” [al-Anʿām 108];
“Let them not stamp their feet so as to reveal what they hide of their adornment” [al-Nūr 31];
“Do not be soft in speech, lest he in whose heart is sickness should yearn for you” [al-Aḥzāb 32];
and His saying, Most High: “O you who believe, when the call to prayer is made on Friday, hasten to the remembrance of Allah and leave off trade” [al-Jumuʿah 9].
Permissible matters are therefore judged by the purposes they serve: if they are used as a means to fulfill an obligation or a recommended act, they themselves become commanded; but if they serve as a means to commit what is forbidden or to abandon a duty, they become prohibited. Deeds are governed by both their initial and their ultimate intentions, and Allah alone grants success.