The meaning of the share of property whom a man bequeaths with

A share is one of eight, due to the saying of Allah, Exalted and Glorious is He: «The charities are only for the poor, the needy, those who work upon (acquiring) them, those with affectionate hearts, the necks (of human…

I asked al-Rida, peace be upon him, about a man who bequeaths with a share of his property and does not know what thing a share is. He said: Is there among you nothing of what has reached you of Ja’far and Abu Ja’far,…