2 Korintus 1:19

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.

2 Korintus 11:6

11:6 And even if I am unskilled ²  in speaking, yet I am certainly not so in knowledge. Indeed, we have made this plain to you in everything in every way.

[1:19]  ¹ sn Silvanus is usually considered to be the same person as Silas (L&N 93.340).

[11:6]  ² sn Unskilled in speaking means not professionally trained as a rhetorician.