Beware of entering upon the ladies
Narrated `Uqba ibn 'Amir may Allah be pleased with him:
Allah's Messenger (may the peace and blessings of Allah be upon him ) said, "Beware of entering upon the ladies." A man from the Ansar said, " O Allah's Messenger! What about Al-Hamu the in-laws of the wife (the brothers of her husband or his nephews etc.)?" The Messenger of Allah (may the peace and blessings of Allah be upon him) replied: The in-laws of the wife are death itself.
Islam is keen to protect the honors from any harm; it safe guards the families from the slander or even to be afflicted indirectly.
Nothing is more is precious to the believer than his religion and his honor, his religion by virtue of which all his affairs is protected. Therefore, the believer may not overlook any of its instructions, or fail short to fulfill the rights of the Creator, or even underestimate any part of the Sunnah of the Messenger of Allah, may the peace and blessings of Allah be upon him.
In order to preserve religion and honor, the Prophet, may the peace and blessings of Allah be upon him, warned usagainst falling into the doubtful matters, which often leads to falling into the prohibited matters or at least leads to gossip.
For this reason, the Prophet, may the peace and blessings of Allah be upon him, forbade men to enter into the rooms of the women other than their mahram (non marriageable) women and wives because the mere fact of entering their places raises suspicion and may cause one to fall into the temptation, especially if it happens usually and is not disapproved according to the customs. Such a false custom is not recognized by the Sharia of Islam and has no authority in any matter.
This Hadith teaches us when to enter the rooms of women, those upon whom one is allowed to enter, what are the conditions that must be met in marriage, and what is the risk of violating this Prophetic commandment. It is noteworthy to mention that this Prophetic commandment aims to protect the honors.
If one is afraid of death, let him be afraid for himself and his wife from the in-law, who is traditionally allowed to enter the house whenever he wants: with or without seeking permission. If he is asked about that, or banned from entering the house, he will say: "What is wrong with you?" This is my brother's house, and in it is my brother's wife. There is no strange woman in the house, until the last thing the devil dictates.
My dear brother, be fair and follow the truth, protect your home from anyone who enters it without permission, especially your relatives and the relatives of your wife.