Sa`d , bin Abu Waqqas , said : Messenger of Allah (PBUH) visited me in my illness which became severe in the year of Hajj -al-Wada`a وقال سعد، بن أبي وقاص،: زارني رسول الله (عليه الصلاة والسلام) في حالتي المرضية

6 - وعن أبي إسحاق سعد بن أبي وقاص مالك بن أهيب بن عبد مناف بن زهرة بن كلاب بن مرة بن كعب بن لؤي القرشي الزهري رضي الله عنه أحد العشرة المشهود لهم بالجنة رضي الله عنهم قال : جاءني رسول الله صلى الله عليه و سلم يعودني عام حجة الوداع من وجع اشتد بي فقلت : يا رسول الله إني قد بلغ بي من الوجع ما ترى وأنا ذو مال ولا يرثني إلا ابنة لي أفأتصدق بثلثي مالي ؟ قال [ لا ] قلت : فالشطر يا رسول الله ؟ فقال [ لا ] قال : فالثلث يا رسول الله ؟ قال : [ الثلث والثلث كثير أو كبير إنك أن تذر ورثتك أغنياء خير من أن تذرهم عالة يتكففون الناس وإنك لن تنفق نفقة تبتغي بها وجه الله إلا أجرت عليها حتى ما تجعل في في امرأتك ] قال فقلت : يا رسول الله أخلف بعد أصحابي ؟ قال : [ إنك لن تخلف فتعمل عملا تبتغي به وجه الله إلا ازددت به درجة ورفعة ولعلك أن تخلف حتى ينتفع بك أقوام ويضر بك آخرون اللهم أمض لأصحابي هجرتهم ولا تردهم على أعقابهم لكن البائس سعد بن خولة ] يرثي له رسول الله صلى الله عليه و سلم أن مات بمكة . متفق عليه .
6- 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 (PBUH) 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 (PBUH) 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''. I said, "O Messenger of Allah, would I survive my companions?'' He said, "If you survive others and accomplish a thing for the sake of Allah, you would gain higher ranking and standing. You will survive them ... your survival will be beneficial to people (the Muslim) and harmful to others (the enemies of Islam). You will survive others till the people will derive benefit from you, and others would be harmed by you.'' Messenger of Allah (PBUH) further said, "O Allah, complete for my Companions their emigration and do not cause them to retract.'' Sa`d bin Khaulah was unfortunate. Messenger of Allah (PBUH) lamented his death as he died in Makkah.
[Al-Bukhari and Muslim].
Commentary: In spite of all their love for it, the Companions of the Prophet (PBUH) did not like to die in a city from which they emigrated for the sake of Allah. For this reason Sa`d (May Allah be pleased with him) was afraid of dying in Makkah. The Prophet (PBUH) prayed for the accomplishment of Sa`d's emigration and expressed regret over the misfortune of Sa`d bin Khaulah. The latter died in Makkah.
Conclusion:
1- The Hadith lays down that in the course of a disease which seems to prove fatal, one cannot give more than one-third of the property in charity.
2- It is also emphasized that one gets reward even for what he spends on his wife and children.
3- One can report to others his ailment or to seek treatment and ask them to supplicate from him.
4- In the matter of Sadaqah (charity), which one gives to seek the Pleasure of Allah, his closest relatives. should always have priority and preference over others.