Bukhari

Hadith Commentary:

While I myself am a widow and an old woman, I used perfume with the intention of acting upon this hadith.

Ibn Hajar said:
This is an error, because he (Abu Sufyan radi Allahu anhu) died in Madinah without any disagreement. The one who died in Sham was her brother, Yazid ibn Abi Sufyan. The hadith is found in the Musnads of Ibn Abi Shaybah and al-Darimi with the wording: "The death of the brother of Umm Habibah or a close relative of hers was announced," and Ahmad has something similar, which strengthens the view that it was her brother.

That is, Allamah Ibn Hajar rahimahullah said that this is a mistake.
Because Abu Sufyan radi Allahu anhu passed away in Madinah without any disagreement.
The one who passed away in Sham was his brother, Yazid ibn Abi Sufyan.
This clarification is present in Musnad Ibn Abi Shaybah, al-Darimi, Musnad Ahmad, and others.
From this hadith, it is apparent that only a wife may observe mourning (iddah) for her husband for four months and ten days, and it is not permissible to mourn for any deceased person for more than three days.
Even in the case of a wife mourning for her husband for this duration, many Islamic benefits and considerations are taken into account.

Hadith Commentary:
It is thus established that women who mourn for more than three days for anyone other than their husband are deprived of faith.
Therefore, they should fear Allah and be concerned for the well-being of their faith.

Hadith Commentary:
(1)
From this hadith, it is understood that it is forbidden (haram) to observe mourning (sog) for more than three days over any deceased person except the husband.
Those women are deprived of faith who violate this command.

(2)
In the title, the mention was of the waiting period (‘iddah), and in this hadith, it is stated that a woman observing ‘iddah should complete the days of ‘iddah according to the method described in the hadith; by violating this, she should not deprive herself of faith.
(‘Umdat al-Qari: 14/357)

Urdu marginal note:
The argument for the chapter is based on the apparent wording, because Islamic Shari‘ah is for the Muslims. This is also the position of Imam Abu Hanifah rahimahullah. The position of Imam Shafi‘i rahimahullah and the majority is that mourning (sog) is obligatory even in this case, but this hadith supports the former position.

Urdu Hashiyah (Commentary):

(1) For the issue of the chapter, see Hadith: 3531, 3532.
(2) "There was no need," because my husband had already passed away; also, after three days of mourning (iddah), it is not obligatory to apply perfume, but it is recommended (mustahabb) to use perfume and the like in order to remove the suspicion of continued mourning. (For further details, see Hadith number 3531, 3532.)