Esias 50:5

5 and the instruction of the Lord, even the Lord, opens mine ears, and I do not disobey, nor dispute.

Esias 50:5 In-Context

3 I will clothe the sky with darkness, and will make its covering as sackcloth.
4 The Lord God gives me the tongue of instruction, to know when it is fit to speak a word: he has appointed for me early, he has given me an ear to hear:
5 and the instruction of the Lord, even the Lord, opens mine ears, and I do not disobey, nor dispute.
6 I gave my back to scourges, and my cheeks to blows; and I turned not away my face from the shame of spitting:
7 but the Lord God became my helper; therefore I was not ashamed, but I set my face as a solid rock; and I know that I shall never be ashamed,

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