Responsibility towards Heir

Abu Ishaq Sa`d bin Abu Waqqas (May Allah be pleased with him) (one of the ten who had been given the glad tidings of entry into Jannah) narrated: 

Messenger of Allah (Peace and blessings of Allah be upon him) visited me in my illness which became severe in the year of Hajjat-ul-Wada` (Farewell Pilgrimage). I said, "O Messenger of Allah, you can see the pain which I am suffering and I am a man of means and there is none to inherit from me except one daughter. Should I give two-thirds of my property in charity?'' He (sallallaahu ’alayhi wa sallam) said, "No". I asked him, "Then half?'' He said, "No". Then I asked, "Can I give away one-third". He said, "Give away one-third, and that is still too much. It is better to leave your heirs well-off than to leave them poor, begging people. You will not expend a thing in charity for the sake of Allah, but you will be rewarded for it; even the morsel of food which you feed your wife''. (Al-Bukhari, Muslim)