Hadith: The best of you are the kindest to my family after me. He said: ‘Abdur-Rahmān ibn ‘Awf, thus, sold a garden for four hundred thousand, then divided it among the wives of the Prophet (may Allah's peace and blessings be upon him)

عن أبي هريرة رضي الله عنه ، قال: قال رسول الله صلى الله عليه وسلم : «خيرُكم خيركم لأهلي مِن بعدي». قال: فباع عبد الرحمن بن عوف حديقةً بأربع مائة ألف، فقسَّمها في أزواج النبي صلى الله عليه وسلم .
[حسن] - [رواه ابن أبي عاصم والحاكم]

Abu Hurayrah (may Allah be pleased with him) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said: "The best of you are the kindest to my family after me." He said: "‘Abdur-Rahmān ibn ‘Awf, thus, sold a garden for four hundred thousand, then divided it among the wives of the Prophet (may Allah's peace and blessings be upon him).
Hasan/Sound. - [Ibn Abi ‘Aasim]

Explanation

This was a commandment for the Companions that the best of them would be the kindest to the Prophet's family, which includes his wives, children, and relatives, after his death. The Companions accepted his commandment and treated his family with honor and reverence. For instance, ‘Abdur-Rahmān ibn ‘Awf sold a garden of his for four hundred thousand, then divided it between the wives of the Prophet (may Allah's peace and blessings be upon him).