Allah's Messenger (ﷺ) said, "You will be rewarded for whatever you spend for Allah's sake even if it were a morsel which you put in your wife's mouth."
Sahih al-Bukhari Book 2, Hadith 49
← Previous Hadith The Prophet (ﷺ) said, "If a man spends on his family (with the intention of having a reward from Allah) sincerely for Allah's sake then it is a (kind of) alms-giving in reward for him.

Sahih al-Bukhari Book 2, Hadith 48 Next Hadith → I gave the pledge of allegiance to Allah's Messenger (ﷺ) for the following:

1. offer prayers perfectly

2. pay the Zakat (obligatory charity)

3. and be sincere and true to every Muslim.

Sahih al-Bukhari Book 2, Hadith 50