30. O wives of the Prophet! Whoever of you commits an open illegal sexual intercourse, the torment for her will be doubled, and that is ever easy for Allah.
31. And whosoever of you is obedient to Allah and His Messenger , and does righteous good deeds, We shall give her, her reward twice over, and We have prepared for her Rizqan Karima (a noble provision Paradise).
32. O wives of the Prophet! You are not like any other women. If you keep your duty (to Allah), then be not soft in speech, lest he in whose heart is a disease (of hypocrisy, or evil desire for adultery, etc.) should be moved with desire, but speak in an honourable manner.
33. And stay in your houses, and do not display yourselves like that of the times of ignorance, and perform As-Salat (Iqamat-as-Salat), and give Zakat and obey Allah and His Messenger. Allah wishes only to remove Ar-Rijs (evil deeds and sins, etc.) from you, O members of the family (of the Prophet ), and to purify you with a thorough purification.
34. And remember (O you the members of the Prophet's family, the Graces of your Lord), that which is recited in your houses of the Verses of Allah and Al-Hikmah (i.e. Prophet's Sunnah legal ways, etc. so give your thanks to Allah and glorify His Praises for this Qur'an and the Sunnah). Verily, Allah is Ever Most Courteous, Well-Acquainted with all things.
Sheikh Maududi in his tafsir:
In these verses, though, only the wives of the Prophet (peace be upon him) have been addressed,
the intention is to enforce reforms in all the Muslim houses. The object of addressing the Prophet’s (peace be upon him) wives in particular is that when a pure way of life will start from his house,
it will be followed by the women of all other Muslim houses as well, because this house was looked upon by the Muslims as a
model to follow. Some people, when they see that these verses have been addressed only to the wives of the Prophet (peace be upon him), assert that these commandments were only meant for them. But when one reads what follows in these verses, he feels that there is nothing which might have been meant particularly for the wives and not for the other Muslim women. Could Allah have intended only this that the wives alone should be free from un-cleanliness and they alone should obey Allah and His Prophet (peace be upon him) and they alone should offer the Salat and pay the Zakat? If this could not be the intention, then how could the command for them to stay in their houses and avoid displaying the fineries and abstain from talking to the other men in an alluring voice be meant particularly for them to the exclusion of all other Muslim women? Is there any rational proof on the basis of which some commands in one and the same context and series be regarded as general and some others as particular and special?
ibn Kathir: These are the good manners which Allah enjoined upon the wives of the Prophet
so that they would be an example for the women of the Ummah to follow. Allah said, addressing the wives of the Prophet that they should fear Allah as He commanded them, and that no other woman is like them or can be their equal in virtue and status.
(And stay in your houses,) means, stay in your houses and
do not come out except for a purpose. One of the purposes mentioned in Shari`ah is prayer in the Masjid, so long as the conditions are fulfilled, as the Messenger of Allah said:«لَا تَمْنَعُوا إِمَاءَ اللهِ مَسَاجِدَ اللهِ وَلْيَخْرُجْنَ وَهُنَّ تَفِلَات»(Do not prevent the female servants of Allah from the Masjids of Allah, but have them go out without wearing fragrance.) According to another report:«وَبُيُوتُهُنَّ خَيْرٌ لَهُن»(even though their houses are better for them.)