Abu Dawud Book 11, Hadith Number 2858.

Chapter : What is permissible for a testator to give as a bequest from his property.

Narated By ‘Amir b. Sa’d on the authority of his father sa’d b. Abi Waqqas : When he (Sa’d) fell ill at Mecca (according to the version of Ibn Abi Khalaf) – then the agreed version has: which brought him near to death – the Apostle of Allah (PBUH) went to visit him. He said: Apostle of Allah, I have a large amount of property, and my daughter is my only heir. May I give two thirds (of my property) as a sadaqah (charity)? He said: No. He asked: Then a half? He replied: No. He asked: Then one third? He replied: (you may will away) a third and a third is a lot. To leave your heirs rich is better than to leave them poor begging from people. You will not spent anything, seeking thereby to please Allah, without being rewarded for it, even the mouthful you give to your wife. I said: Apostle of Allah, shall I be left behind from immigration (to Medina)? He said: If you remain behind after me and do good works seeking the pleasure of Allah, your rank will be raised and degree increased. Perhaps you will not remain behind, and some people will benefit from you and others will be harmed by you. He then said: O Allah, complete the immigration of my Companions and do not turn them back. But miserable was Sa’d b. Khawlah. The Apostle of Allah (PBUH) lamented on him as he died at Mecca.