Romans 16:25
Doxology
25 bNow to him who is able to strengthen you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery that was kept csecret for long ages
1 Corinthians 2:7
7 But we impart a csecret and hidden wisdom of God, which God ddecreed before the ages for our glory.
Colossians 1:26
26 the bmystery hidden for ages and generations but now revealed to his saints.