Ibn Sa'd محمد بن سعد البغدادي · The Book of Wills

Allah's Apostle (ﷺ) visited me during my illness. I said: I am willing away the whole of my property. He said: No. I said: Then half? He said: No. I said: Should I will away one-third? He said: Yes, and even one-third is enough.

"The Prophet came to visit me when I was in Makkah. I said: 'O Messenger of Allah, shall I bequeath all my money?' He said: 'No.' I said: 'One-half?' He said: 'No.' I said: 'One-third?' He said: '(Bequeath) one-third, and one-third is a lot. If you leave your heirs independent of means, that is better than if you leave them poor and holding out their hands to people.'"