2 Corinthians 1:
15 And in this confidence I was minded to come unto you before, that ye might have a second benefit;
16 And to pass by you into Macedonia, and to come again out of Macedonia unto you, and of you to be brought on my way toward Judaea.
17 When I therefore was thus minded, did I use lightness? or the things that I purpose, do I purpose according to the flesh, that with me there should be yea yea, and nay nay?
18 But as God is true, our word toward you was not yea and nay.
19 For 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.
20 For all the promises of God in him are yea, and in him Amen, unto the glory of God by us.
2 Cor. 1:15-20