(1) باب الْوَصِيَّةِ بِالثُّلُثِ
Ibn Sa'd reported his father as saying:
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.
Reference: Sahih Muslim 1628 f
In-book reference: Book 25, Hadith 11
USC-MSA web (English) reference(deprecated numbering scheme): Book 13, Hadith 3996