NET

19 For the Son of God, Jesus Christ, the one who was proclaimed among you by us—by me and Silvanus and Timothy—was not “Yes” and “No,” but it has always been “Yes” in him.

Darby

19 For the Son of God, Jesus Christ, he who has been preached by us among you (by me and Silvanus^D8382 and Timotheus), did not become yea and nay, but yea *is*^D8383 in him.

Darby Bible Notes

Silvanus - * i.e. Silas, Acts 18.5. *is* - The apostle here changes from the aorist 'did not become' to the perfect tense of the same verb, translated 'is.' He is not speaking of the character of his preaching, but declaring that the verification of all divine truth is in the Person of Christ.

KJV

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.

Strong's

19 For ^G1063 the Son^G5207 of God^G2316, Jesus^G2424 Christ^G5547, who^G3588 was preached^G2784 among^G1722 you^G5213 by^G1223 us^G2257, even by^G1223 me^G1700 and^G2532 Silvanus^G4610 and^G2532 Timotheus^G5095, was^G1096 not^G3756 yea^G3483 and^G2532 nay^G3756, but^G235 in^G1722 him^G846 was^G1096 yea^G3483.