is the Sunnah.
As for the term “family,” Sahīh Muslim reports that Zayd ibn Arqam said: “The Messenger of Allah, may Allah bless him and grant him peace, addressed us at a watering place called Khumm, between Mecca and Medina. He said, ‘I am leaving among you the two weighty things, one of which is greater than the other: the Book of Allah’—and he urged adherence to it. He then said, ‘My family, the members of my household. I remind you of your duty to Allah concerning my household. I remind you of your duty to Allah concerning my household. I remind you of your duty to Allah concerning my household.’”
This shows that he commanded adherence to the Quran and enjoined the community to care for his household. As for his statement, “That which, if you hold fast to it, will keep you from going astray thereafter: the Book of Allah and my family,” it was narrated by al-Tirmidhī and judged weak by Ahmad