Sa'd bin Malik said:
The Messenger of Allah came to visit me while I was sick. He said: 'Do you have a will?' I said: 'Yes.' He said: 'For how much?' I said: 'All of my wealth, for the cause of Allah.' He said: 'What did you leave for your children?' He (Sa'd) said: They are rich in goodness.' He said: 'Will a tenth.' He (Sa'd) said: He (pbuh) continued decreasing it until he said: 'Will a third, and a third is too great.' (One of the narrators:) Abdur-Rahman said: We considered it recommended that it be less than a third, since the Messenger of Allah said: 'And a third is too great.'