Sirach 36:5

5 And let them know thee, as we have known thee, that there is no God but only thou, O God.

Sirach 36:5 In-Context

3 Lift up thy hand against the strange nations, and let them see thy power.
4 As thou wast sanctified in us before them: so be thou magnified among them before us.
5 And let them know thee, as we have known thee, that there is no God but only thou, O God.
6 Shew new signs, and make other strange wonders: glorify thy hand and thy right arm, that they may set forth thy wondrous works.
7 Raise up indignation, and pour out wrath: take away the adversary, and destroy the enemy.

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