Musnad Ahmad 30:2256

'Affan narrated to us, he said: Hammad narrated to us, he said: Thabit informed us, from Abu Rafi', from Abu Hurairah, that the Messenger of Allah, peace and blessings of Allah be upon him, said: "There was a tree that was harming the people of the road, so a man cut it down and moved it aside, and he entered Paradise."