Husayn then asked him, “And who exactly are his household, O Zayd? Are not his wives part of his household?”

Zayd replied, “His wives are indeed part of his household, but the household meant here are those for whom charity (zakah) is forbidden after him.”
Husayn said, “And who are they?”
He answered, “They are the family of ʿAli, the family of ʿAqil, the family of Jaʿfar, and the family of al-ʿAbbas.”
Husayn asked, “Is charity forbidden to all of them?”
He said, “Yes.”
Narrated by Muslim.

In another wording: “Hear me well! I am leaving among you two weighty trusts: one of them is the Book of Allah—it is the Rope of Allah; whoever follows it is on guidance, and whoever abandons it is in misguidance.”

2/347 — Ibn ʿUmar narrated, from Abu Bakr al-Ṣiddīq (may Allah be pleased with him), in a mawqūf report, that he said: “Take care of Muhammad with respect to his household.”
Recorded by al-Bukhārī.

The verb irqabū here means: look after him, honor him, and show him due respect. And Allah knows best.

[Commentary]
This hadith and this athar clarify the right owed to the Prophet’s family. As noted earlier, his household comprises his wives and every believing relative—namely the families of ʿAli, ʿAqil, Jaʿfar, and al-ʿAbbas. It is unlawful for them to receive charity, because the Prophet ﷺ said to his uncle al-ʿAbbas, when the latter asked about charity: “These charities are nothing but the impurities of people,”