سنن ابن ماجه

It was narrated from Malik bin Mighwal that Talhah bin Musarrif said: “I said to Abdullah bin Abu Awfa: 'Did the Messenger of Allah (ﷺ) make a will concerning anything?' He said: 'No.' I said: 'How come he told the Muslims to make wills?' He said: 'He enjoined (them to adhere to) the book of Allah (SWT).” Malik said: “Talhah bin Musarrif said: 'Huzail bin Shurahbil said: “Abu Bakr was granted leadership according to the will of Allah's Messenger (ﷺ)?” (Rather) Abu Bakr wished that the found a covenant (in that regard) from Allah's Messenger (ﷺ), so he could fetter his nose with a (camel's) nose ring.”