2 Corinthians 1:18-19
1:18 But as God is faithful, our message to you is not “Yes” and “No.”
1:19 For the Son of God, Jesus Christ, the one who was proclaimed among you by us – by me and Silvanus 1 and Timothy – was not “Yes” and “No,” but it has always been “Yes” in him.
1 sn Silvanus is usually considered to be the same person as Silas (L&N 93.340).