Hadith.5473 - Aban ibn Taghlib narrated from Imam Ali ibn Al-Hussain عليه السلام that Imam عليه السلام was asked about a man who made a bequest (waṣiyyah) of something from his wealth.
Imam عليه السلام replied: "The portion specified in the Book of (Imam) Ali عليه السلام is one out of six parts."