1 tn BDAG 233 s.v. διαμαρτύρομαι 1 has “testify of, bear witness to (orig. under oath)…of repentance to Judeans and Hellenes Ac 20:21.”
2 tc Several
sn Repentance toward God and faith in our Lord Jesus. Note the twofold description of the message. It is a turning to God involving faith in Jesus Christ.