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
Ephesians 3:9
9 and pto bring to light for everyone what is the plan of the mystery qhidden for ages in1 God, who created all things,
Colossians 1:26
26 the bmystery hidden for ages and generations but now revealed to his saints.