18But as God is true, our word toward you was not yea and nay.

 19For the Son of God, Jesus Christ, who was preached among you by us, even by me and Silvanus and Timotheus, was not yea and nay, but in him was yea.

 20For all the promises of God in him are yea, and in him Amen, unto the glory of God by us. (2 Corinthians 1:18-20, King James Version)