Colossians 4:3 in the King James Version
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:
Context
2 Continue steadfastly in prayer, watching in it with thanksgiving,
3 praying together for us also, that God may open to us a door for the word, to speak the mystery of Christ, for which I am also in bonds,
4 that I may reveal it as I ought to speak.