Сильмариллион, глава 2. Речь идет о гномах и энтах.
"Then Manwё; and Yavanna parted for that time, and Yavanna returned to Aulё; and he was in his smithy, pouring molten metal into a mould. 'Eru is bountiful,' she said. 'Now let thy children beware!
For there shall walk a power in the forests whose wrath they will arouse at their peril (
курсив мой).'
'
Nonetheless they will have need of wood (
курсив мой),' said Aulё, and he went on with his smith-work."
Вот потому и не любят - гномы рубят деревья