Abu Dawud Book 36, Hadith Number 5225.
Chapter : Not known.
Narated By AbuHurayrah : The Prophet (PBUH) said: A man never did a good deed but removed a thorny branch from the road; it was either in the tree and someone cut it and threw it on the road, or it was lying in it, he removed it. Allah accepted this good deed of his and brought him into Paradise.