Hadith 540
Sayyiduna Abu Hurairah, may Allah be pleased with him, narrates this statement of the Prophet Muhammad, peace and blessings be upon him: "A man removed a thorny branch from the road. This person had never done any good deed, either the branch was attached to a tree and he cut it off and put it aside, or it was lying on the road and he moved it away, so Allah Almighty accepted this deed of his and admitted him into Paradise."
Imam Ibn Hibban, may Allah have mercy on him, says: The words of the narration "he had never done any good deed" mean that apart from being a Muslim, he had not done any other good deed.