“It was narrated that Talhah bin Musarrif said, ‘I asked ’Abdullah ibn Abi Awfa, ‘Did the Messenger of Allaah ﷺ leave a will?’ He said, ‘No.’ I said, ‘Why is making a will prescribed for the Muslims, or why are they commanded to make wills?’ He said, ‘His final will was to adhere to the Book of Allaah.’’” [Muslim, The Book of Wills, no. 4227]
“I [i.e., al-Albaani] say: i.e., to act according to what is in it and to judge by it when disputes occur, and this great will has become virtually nullified amongst the masses of Muslims today—as for their rulers, then they have turned away from acting according to it and have followed the laws laid down by the disbelievers, and as for their public, then they refuse to judge according to it in disputed issues and have [instead] taken to the opinions of men and their madhhabs, becoming content with reciting it in their houses and over the graves of their deceased, for blessing.
So to Allaah we complain and from Him do we seek aid.”
Mukhtasar Saheeh Muslim, p. 259.