1 Timothy 6:21
Which some professing have erred concerning the faith. Grace be with thee. Amen. The first to Timothy was written from Laodicea, which is the chiefest city of Phrygia Pacatiana.
Cross-reference
In 1 Timothy 6:10, love of money causes some to wander from the faith, paralleling how professing false knowledge leads to swerving.
In 1 Timothy 1:6, some have swerved into vain discussion, matching the swerving from faith here and linking false teaching to empty talk.
In 1 Timothy 1:19, rejecting faith and a good conscience causes shipwreck of faith, mirroring the swerving from faith in this verse.
Romans 16:24 also closes with 'The grace of our Lord Jesus Christ be with you all. Amen.' — parallel benediction.
In 2 Timothy 2:18, the same verb 'erred' (ἠστόχησαν) describes those who swerve from the truth, directly echoing the error concerning the faith here.
2 Timothy 4:22 concludes with 'Grace be with you. Amen.' — the exact same closing phrase as here.
Titus 3:15 ends with 'Grace be with you all. Amen.' — a parallel closing benediction.
Hebrews 13:25 closes with 'Grace be with you all. Amen.' — same formulaic benediction.
Colossians 4:18 likewise ends with 'Grace be with you' — Paul's typical closing benediction to his letters.