Esias 10:21

21 And the remnant of Jacob shall on the mighty God.

Esias 10:21 In-Context

19 And they that are left of them shall be a number, and a child shall write them.
20 And it shall come to pass in that day the remnant of Israel shall no more join themselves with, and the saved of Jacob shall no more trust in, them that injured them; but they shall trust in the Holy God of Israel, in truth.
21 And the remnant of Jacob shall on the mighty God.
22 And though the people of Israel be as the sand of the sea, a remnant of them shall be saved.
23 He will finish the work, and cut it short in righteousness: because the Lord will make a short work in all the world.

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