Sunan Abi Dawud 4947
سنن أبي داود#4947SahihHudhaifah said :Your prophet (May peace be upon him) said : Every good act is a SADAQAH (almsgiving)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiSahih Muslim (1005)
In-book reference: 43:175