Esias 41:18

18 but I will open rivers on the mountains, and fountains in the midst of plains: I will make the desert pools of water, and a thirsty land watercourses.

Esias 41:18 In-Context

16 and thou shalt winnow , and the wind shall carry them away, and a tempest shall scatter them: but thou shalt rejoice in the holy ones of Israel.
17 And the poor and the needy shall exult; for they shall seek water, and there shall be none, their tongue is parched with thirst, I the Lord God, I the God of Israel will hear, and will not forsake them:
18 but I will open rivers on the mountains, and fountains in the midst of plains: I will make the desert pools of water, and a thirsty land watercourses.
19 I will plant in the dry land the cedar and box, the myrtle and cypress, and white poplar:
20 that they may see, and know, and perceive, and understand together, that the hand of the Lord has wrought these , and the Holy One of Israel has displayed .

The Brenton translation of the Septuagint is in the public domain.