That he was told by the most learned one amongst them (i.e. Ibn Abbas)...

Hadith 3:802

Narrated Tawus:

That he was told by the most learned one amongst them (i.e. Ibn Abbas) that the Prophet went towards some land which was flourishing with vegetation and asked to whom it belonged. He was told that such and such a person took it on rent. The Prophet said, "It would have been better (for the owner) if he had given it to him gratis rather than charging him a fixed rent.