O you who have believed, do not enter the houses of the Prophet except when you are permitted for a meal, without awaiting its readiness. But when you are invited, then enter; and when you have eaten, disperse without seeking to remain for conversation. Indeed, that [behavior] was troubling the Prophet, and he is shy of [dismissing] you. But Allah is not shy of the truth. And when you ask [his wives] for something, ask them from behind a partition. That is purer for your hearts and their hearts. And it is not [conceivable or lawful] for you to harm the Messenger of Allah or to marry his wives after him, ever. Indeed, that would be in the sight of Allah an enormity.
(Quran-33:53)
Why???
The Prophet is more worthy of the believers than themselves, and his wives are [in the position of] their mothers. And those of [blood] relationship are more entitled [to inheritance] in the decree of Allah than the [other] believers and the emigrants, except that you may do to your close associates a kindness [through bequest]. That was in the Book inscribed.
(Quran-33:6)
Note: There's a spesific individuals or groups cant do something just like others does...
For example just like priest does...
Leviticus 21:5-7 Revised Standard Version (RSV)
5 They shall not make tonsures upon their heads, nor shave off the edges of their beards, nor make any cuttings in their flesh.
6 They shall be holy to their God, and not profane the name of their God; for they offer the offerings by fire to the Lord, the bread of their God; therefore they shall be holy.
7 They shall not marry a harlot or a woman who has been defiled; neither shall they marry a woman divorced from her husband; for the priest is holy to his God.
Leviticus 21:13-14 New International Version (NIV)
“‘The woman he marries must be a virgin.
He must not marry a widow, a divorced woman, or a woman defiled by prostitution, but only a virgin from his own people,
Ezekiel 44:21-23 King James Version (KJV)
Neither shall any priest drink wine, when they enter into the inner court.
Neither shall they take for their wives a widow, nor her that is put away: but they shall take maidens of the seed of the house of Israel, or a widow that had a priest before.
And they shall teach my people the difference between the holy and profane, and cause them to discern between the unclean and the clean.
Why was Aisha (ra) not allowed to remarry after Prophet Muhammad's death?
U.S. Christians denounce Muslim child marriages, yet 28 states support it !!
