It was narrated from Muhammad bin Sa"d, from his father, that:

The Prophet (ﷺ) entered upon him in Makkah when he was sick. He said: I have only one daughter, should I bequeath all of my wealth (to charity)? The Prophet (ﷺ) said: “No." He said: Should I bequeath half of it? The Prophet (ﷺ) said: “No." He said: Should l bequeath one third of it? He said: “One third, and one third is a lot."