1 Corinthians 16:9
"For a great door and effectual is opened unto me, and there are many adversaries."
Cross References (ranked by relevance)
Furthermore, when I came to Troas to preach Christ’s gospel, and a door was opened unto me of the Lord,
And when they were come, and had gathered the church together, they rehearsed all that God had done with them, and how he had opened the door of faith unto the Gentiles.
Withal praying also for us, that God would open unto us a door of utterance, to speak the mystery of Christ, for which I am also in bonds:
If after the manner of men I have fought with beasts at Ephesus, what advantageth it me, if the dead rise not? let us eat and drink; for to morrow we die.
(For many walk, of whom I have told you often, and now tell you even weeping, that they are the enemies of the cross of Christ: