The Messenger of Allah (sal Allahu alaihi wa sallam) said: “A man who thinks about the body of a woman under her clothes until he can visualize her shape, will not even smell the fragrance of Paradise.” [Albahr-ul Raaiq, vol. 8, p. 218]
A woman who keeps herself hidden and covered would hate to be the object of a strange man’s fantasies. There is no police in the world that can know or prevent a man from thinking about another woman. The only person who can stop him is himself. The only police that he can be scared of, are Allah’s angels who will carry out His orders of punishment, since nothing remains hidden from Him.
You are your own police. Let your conscience police you before Allah’s angels have to do the job! Thinking about and imagining the looks of a non-Mahram is forbidden in the Shariah. So save yourself from unworthy thoughts – thoughts that will keep you out of Paradise!
The Messenger of Allah (sal Allahu alaihi wa sallam) said: “Beware, no one should spend a night alone in a house with a single (divorced or widowed) woman unless he is married to her, or happens to be her Mahram.” [Muslim]
“In the above Hadith, it is prohibited for any man to spend a night alone in a house with a non-Mahram woman. This prohibition is based on foresight and wisdom. In principle, it is prohibited for a non-Mahram man and woman to be alone together under all circumstances, but the specific prohibition of spending a night alone under one roof has been separately mentioned, because in the darkness of night where others are not likely to witness anything, the opportunities for misconduct are greater. Again, all the non-Mahram relatives, such as cousins and brothers-in-law, are also included in this prohibition. Often, women do not take precaution with these men and go in front of them without Hijab. This prohibition is both for men and women. Men have been addressed in the Hadith, because they are stronger and may not be easily deterred by a woman.
“Imam Nawawi writes in Sharah Muslim that the reason that divorced and widowed women were separately mentioned in this Hadith is that due to their being alone, these women become easy prey for men who are looking to marry or have bad intentions. They will not dare to visit single girls because they protect themselves and are also protected by their parents.” [Hijab by Dr. Mohammed Ismail Memon Madani]