2nd Corinthians 1:18

15 And being certain of this, it was my purpose to come to you before, so that you might have a second grace;

16 And by way of Corinth to go into Macedonia, and from there to come back again to you, so that you might send me on my way to Judaea.

17 If then I had such a purpose, did I seem to be changing suddenly? or am I guided in my purposes by the flesh, saying, Yes, today, and, No, tomorrow?

18 As God is true, our word to you is not Yes and No.

19 For the Son of God, Jesus Christ, whom we were preaching among you, even I and Silvanus and Timothy, was not Yes and No, but in him is Yes.

20 For he is the Yes to all the undertakings of God: and by him all the words of God are made certain and put into effect, to the glory of God through us.

21 Now he who makes our faith strong together with you, in Christ, and has given us of his grace, is God;