سنن النسائي

It was narrated from Muhammad bin Sa'd, from his father Sa'd bin Malik, that the Prophet (ﷺ) came to him when he was sick and he said: "I do not have any children apart from one daughter. Shall I bequeath all my wealth?" The Prophet (ﷺ) said: "No." He said: "Shall I bequeath half of it?" The Prophet (ﷺ) said: "No." He said: "Shall I bequeath one-third of it?" He said: "One-third, and one-third is much or large."