Esias 48:21

21 And if they shall thirst, he shall lead them through the desert; he shall bring forth water to them out of the rock: the rock shall be cloven, and the water shall flow forth, and my people shall drink.

Esias 48:21 In-Context

19 Thy seed also would have been as the sand, and the offspring of thy belly as the dust of the ground: neither now shalt thou by any means be utterly destroyed, neither shall thy name perish before me.
20 Go forth of Babylon, thou that fleest from the Chaldeans: utter aloud a voice of joy, and let this be made known, proclaim it to the end of the earth; say ye, The Lord hath delivered his servant Jacob.
21 And if they shall thirst, he shall lead them through the desert; he shall bring forth water to them out of the rock: the rock shall be cloven, and the water shall flow forth, and my people shall drink.
22 There is no joy, saith the Lord, to the ungodly.

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