From Sahih Muslim (Hadith 4479):
A'isha reported that Hind came to Allah's Apostle (ﷺ) and said:Messenger of Allah, by Allah, there was no other household upon the surface of the earth than your household about which I cherished Allah bringing disgrace upon it, (and now) there is no other household upon the surface of the earth than your household about which I cherish Allah granting it honour. Allah's Apostle (ﷺ) said: It is so, by Him in Whose Hand is my life She said: Allah's Messenger, Abu Sufyan is a niggardly person. Is there any harm for me if I spend upon his children out of his wealth without his permission? Thereupon Allah's Apostle (ﷺ) said: There is no harm for you if you spend upon them what is reasonable
Reference: Muslim 4479