Isaiah 61:1
1 The Spirit of the Sovereign Lord is upon me, because the Lord has chosen me. He has commissioned me to encourage the poor, to help the brokenhearted, to decree the release of captives and the freeing of prisoners, 2 to announce the year when the Lord will show his favor, the day when our God will seek vengeance, to console all who mourn, 3 to strengthen those who mourn in Zion by giving them a turban, instead of ashes, oil symbolizing joy, instead of mourning, a garment symbolizing praise, instead of discouragement. They will be called oaks of righteousness, trees planted by the Lord to reveal his splendor.
Psalms of Solomon 11:1
1 Sound in Zion the trumpet that summons the holy ones. Announce in Jerusalem the voice of one proclaiming good news: 'God has been merciful to Israel by his watchful care over them.' 2 Stand on a high place, O Jerusalem, and see your children from east to west finally brought together by the Lord. 3 From the north they come with the joy of their God; from far distant islands God brings them together.
Notes and References
"... the position of Mark 1:2-3, occurring immediately after he introductory verse, shows the importance of the quotation. After mention is made of the beginning of the gospel, Mark is concerned to how how the gospel is rooted in Old Testament prophecy, especially in the later chapters of Isaiah.' As we have seen, in Isaiah chapter 40, a few verses after verse 3 (which is quoted in Mark 1:3), Zion is named as 'herald of good tidings' (verse 9). This is the first of five occurrences of the verb רטב ('bring good tidings') in Isaiah, another being in Isaiah 52:7, the verse we are considering, whose 'kingdom' phraseology we have noted is duplicated in Targum Isaiah 40:9 (The other occurrences are Is. 41:27; 60:6; 61:1 ... Psalms of Solomon 11:1, 2 also has a reference to a messenger of good news) ..."
Rowe, Robert D. God's Kingdom and God's Son: The Background in Mark's Christology from Concepts of Kingship in the Psalms (p. 117) Brill, 2002