What is the expression found in the three schools of thought regarding the obligation of the niqab: "a time of fitna" or "if there is fear of fitna occurring"? And does the noble verse: (It is not lawful for you to take women thereafter, nor that you should exchange them for other wives, even though their beauty may please you) indicate that some women were not wearing niqab during the time of the Prophet, peace and blessings be upon him?

The two phrases were mentioned, and the obligation to cover the face is not merely because it is 'awrah (private parts), but also because uncovering it facilitates a forbidden act, which is looking with lust. It must be covered when there is fear of temptation, especially in our current era where religious deterrents have weakened. Therefore, what the questioner mentioned, that a woman uncovering her face in societies of immodest display does not lead to temptation, is incorrect and reality refutes it. The verse (لَا يَحِلُّ لَكَ النِّسَاء مِن بَعْدُ وَلَا أَن تَبَدَّلَ بِهِنَّ مِنْ أَزْوَاجٍ وَلَوْ أَعْجَبَكَ حُسْنُهُنَّ) was not understood in the way the questioner understood it; rather, scholars derived from it the permissibility of looking at a woman one intends to propose to.