Hebrews 2:13

13. And again Isaiah 8:17. The words in our English version are, “I will wait upon the Lord;” but in the Septuagint Greek they are as here quoted verbatim. The I is here applied to Christ. The passage can hardly be considered as Messianic in Isaiah. Words applied by the prophet to himself as a man, are here as a man applied to Christ. The same words, I will put my trust in him, are found in the Greek of the Septuagint of 2 Samuel 22:3, with which similar words in Psalms 18:3 closely correspond. But the reference here is, doubtless, to Isaiah’s words.

And again Quoted from Isaiah’s next verse. Both quotations imply that the same Christ trusted, like his brethren, in God, and that he presented the children of God, by God to him given, before the God who had given them. They were not Christ’s children, but God’s, and Christ’s brethren.