Sahih Muslim | Book 13 | Hadith Number 4000

Narrated by Ibn 'Abbas (Allah be pleased with them)
Ibn 'Abbas (Allah be pleased with them) said: (I wish) if people would reduce from third to fourth (part for making a will of their property), for Allah's Messenger (may peace be upon him) said: So far as the third (part) is concerned it is quite substantial. In the hadith transmitted on the authority of Waki (the words are) "large" or "much".