Hudhaifa and Abu Shaiba reported Allah's Messenger (ﷺ) as saying: Every act of goodness is sadaqa.
Related hadith on this topic
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues:
The concept of charity (sadaqah) is not limited only to wealth; rather, every small or great good deed is charity (sadaqah).
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 4947