(3) باب الْوَصِيَّةِ بِالثُّلُثِ
Narrated Ibn `Abbas:
I recommend that people reduce the proportion of what they bequeath by will to the fourth (of the whole legacy), for Allah's Messenger (ﷺ) said, "One-third, yet even one third is too much." (ES)
Reference (ES): Sahih al-Bukhari 2743 (ES)
In-book reference (ES): Book 55, Hadith 6 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 51, Hadith 6 (ES)