(7) باب الصَّدَقَةِ عِنْدَ الْمَوْتِ
Narrated Abu Huraira:
A man asked the Prophet, "O Allah's Messenger (ﷺ)! What kind of charity is the best?" He replied. "To give in charity when you are healthy and greedy hoping to be wealthy and afraid of becoming poor. Don't delay giving in charity till the time when you are on the death bed when you say, 'Give so much to soand- so and so much to so-and so,' and at that time the property is not yours but it belongs to so-and-so (i.e. your inheritors).
Reference: Sahih al-Bukhari 2748
In-book reference: Book 55, Hadith 11
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 51, Hadith 11