Isaiah 49:1
1 Listen to me, you coastlands! Pay attention, you people who live far away! The Lord summoned me from birth; he commissioned me when my mother brought me into the world. 2 He made my mouth like a sharp sword, he hid me in the hollow of his hand; he made me like a sharpened arrow, he hid me in his quiver. 3 He said to me, “You are my servant, Israel, through whom I will reveal my splendor.” 4 But I thought, “I have worked in vain; I have expended my energy for absolutely nothing.” But the Lord will vindicate me; my God will reward me.
1 Enoch 48:6
4 He will be a staff for the righteous to lean on and not fall, and he will be the light of the Gentiles, and the hope for those who are troubled of heart. 5 All who dwell on earth shall bow and worship before him, and will praise, bless, and sing to celebrate the Lord of Spirits. 6 For this reason, he has been chosen and hidden before Him, before the creation of the world and forevermore. 7 The wisdom of the Lord of Spirits has revealed him to the holy and righteous; for he has preserved all of the righteous because they have hated and despised this world of unrighteousness, and have hated all its works and ways in the name of the Lord of Spirits: for in his name they are saved, and it has been according to his good pleasure in regard to their life.
Notes and References
"... That the 'Chosen One' has its source in Second Isaiah's oracles about the Servant of YHVH is evident from two texts. The clearest of these is 1 Enoch 49:3-4, which is, in part, a paraphrase of Isaiah 42 ... The second passage (48:1-7) describes the naming of the Son of Man, drawing a number of phrases from Second Isaiah's description of the call of the Servant in Isaiah 49. Although the passage employs the designation 'Son of Man, it states that 'he was chosen and hidden in his presence before the world was created' (48:6, compare Isaiah 49:1-2) ..."
Nickelsburg, George W. E. A Commentary on the Book of 1 Enoch Chapters 37-82 (p. 117) Fortress Press, 2012