Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates: Two men came to the Prophet (peace and blessings be upon him) and asked him for something. The Prophet (peace and blessings be upon him) said: "Go to these ravines, gather some firewood from there, and sell it." So they went and gathered firewood, then came back and sold it, and they obtained food. Then they went again and gathered firewood again, then came back. They kept doing this until they bought two garments as well, and then they bought two donkeys too. They said: "Allah Almighty has placed blessing for us in the command of the Messenger of Allah (peace and blessings be upon him)."
Al-Bazzar recorded it. Its chain contains Bishr bin Harb, who has been criticised and has also been declared trustworthy.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الزكاة / 4512