Bukhari

Hadith Commentary:
That is, just as the salaries of the officials of the Islamic government will be given, in the same manner, the maintenance (nafaqah) of the noble wives (azwaj mutahharat) will also be paid from the public treasury (bayt al-mal).

Hadith Commentary:
➊
By "amil" (عامل) is meant those people who used to supervise the collection of alms (sadaqat). Some commentators have interpreted this to refer to the ruler of the time and the caliph.

➋
During his lifetime, the Messenger of Allah (sallallahu alayhi wa sallam) would, from his alms (sadaqat), set aside the expenses for his family and the stipends for the supervisors, and whatever remained would be spent on the affairs and needs of the Muslims. Since, after his passing, his wives were not permitted to marry anyone else, their maintenance and expenses continued to be paid from this same source after his death.

➌
During his caliphate, Umar (radi Allahu anhu) gave the Mothers of the Believers (Ummahat al-Mu'minin) the choice to either continue receiving their expenses or to take plots of land and have them cultivated through sharecropping (muzara‘ah). Thus, when Aisha (radi Allahu anha) and Hafsa (radi Allahu anha) preferred land, they were given land in Ghabah, and their share from the alms was discontinued, while the rest of the wives continued to receive their expenses as before.
(: ‘Umdat al-Qari: 432/10)

Hadith Commentary:
It is understood that whoever manages a waqf (endowed) property, that is, its mutawalli (administrator), is entitled to receive a reasonable compensation for his effort from the property itself.
(Wahidi)

Hadith Authentication:
[وأخرجه البخاري 3096 و مسلم 1760 من حديث مالك به]

Jurisprudential Explanation:
➊ For the jurisprudence of the hadith, see: Al-Muwatta Hadith: 44
➋ The Prophets and Messengers do not leave behind material inheritance; rather, their inheritance is knowledge. Whatever wealth they leave behind, after fulfilling the prescribed (shar‘i) expenditures, the remainder is all charity (sadaqah).
➌ The maintenance (nafaqah) of the wife is the responsibility of the husband.
➍ In the chapter of Al-Muwatta of Imam Malik in which this hadith is mentioned, in the chapter immediately preceding it, «ماجاء فى التقي», it is narrated from Sayyiduna Anas bin Malik radi Allahu anhu that ‘Umar bin al-Khattab (radi Allahu anhu) was in a walled enclosure (talking to himself) and was saying: “O ‘Umar bin al-Khattab! You are the Commander of the Faithful! Bravo, bravo! By Allah! (O ‘Umar!) You must certainly fear Allah, otherwise He will punish you.” I was listening to this from behind the wall. [الموطأ 2/992 ح1933، وسنده صحيح]
➎ In the narration of Al-Muwatta of Imam Malik (as narrated by Abu Mus‘ab al-Zuhri), in the chapter before the one containing this hadith, it is written that ‘Abdullah bin al-Zubayr (radi Allahu anhu), when he would hear the sound of thunder (ra‘d), would stop speaking and say: «سُبْحَانَ الَّذِيْ يُسَبِّحُ الرَّعْدُ بِحَمْدِهِ وَالْمَلَائِكَةُ مِنْ خِيْفَتِهِ» “Glory be to Him whom the thunder glorifies with His praise, and the angels glorify out of fear of Him.” Then he would say: “For the people of the earth, this is a severe warning.” [الموطأ رواية ابي مصعب 2/171 ح2094، وسنده صحيح، البخاري فى الأدب المفرد : 723، البيهقي فى السنن الكبريٰ : 3/362]