Hmam bin Yahya bin Dinar همام بن يحيى بن دينار · The Book of Wills

"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.'"