1 Enoch 61:5
4 The elect shall begin to dwell with the elect, And those are the measures which shall be given to faith And which shall strengthen righteousness. 5 And these measures shall reveal all the secrets of the depths of the earth, And those who have been destroyed by the desert, And those who have been devoured by the beasts, And those who have been devoured by the fish of the sea, That they may return and stay themselves On the day of the Elect One; For none shall be destroyed before the Lord of Spirits, And none can be destroyed.
Philippians 1:6
1 From Paul and Timothy, slaves of Christ Jesus, to all the saints in Christ Jesus who are in Philippi, with the overseers and deacons. 2 Grace and peace to you from God our Father and the Lord Jesus Christ! 3 I thank my God every time I remember you. 4 I always pray with joy in my every prayer for all of you 5 because of your participation in the gospel from the first day until now. 6 For I am sure of this very thing, that the one who began a good work in you will perfect it until the day of Christ Jesus.
Notes and References
"... Though the term itself is not used frequently, the concept of a day when God would judge and save pervades this literature (e.g., Apocalypse of Abraham 29:14–21; 1 Enoch 1:3–9; 100:1–6; 2 Baruch 24:1–2; 83:1–7). In some instances an agent of judgment and restoration works on behalf of God, and so the day may be designated by some appropriate expression such as the “day of the Elect One” (1 Enoch 61:5). This day is understood as bringing to an end the present age and to usher in the glorious age to come (e.g., 2 Esdras 7:112–114; 2 Enoch 65:5–11). The Gospels and the letters of Paul use the terms “day of the Lord” and “day of judgment” in continuity with the emphases of Jewish apocalyptic literature (e.g., Matthew 10:15; 11:22, 24; 12:36; 1 Thessalonians 5:2; 2 Thessalonians 2:2). They do, of course, understand the “Lord” in the “day of the Lord” to be a reference to Jesus Christ and his role as judge at the Parousia (e.g., 1 Corinthians 1:8; 5:5; 2 Corinthians 1:14). Also in continuity with Jewish literature, Paul uses the expression “day of Christ” to identify explicitly Jesus Christ as the agent of judgment (Philippians 1:10; 2:16, also 1:6) ..."
Martin, Ralph P. Dictionary of the Later New Testament & Its Developments (p. 431) InterVarsity Press, 1997