(from the Valaquenta, in The Silmarillion)
"Then Yavanna arose and stood upon Ezellohar, the Green Mound, but it was bare now and black; and she laid her hands upon the Trees, but they were dead and dark, and each branch that she touched broke and fell lifeless at her feet."
(from "Of the Flight of the Noldor," Ch. 9 of The Silmarillion)
(The phrase "Eä! Let these things be!" is what is spoken by Eru in the Ainulindalë, just before the visible world is created.)
(Thanks to Nath for the quick, thorough, and gentle beta - *sends hugs*)