Matthew 3:8 - Ellicott's Commentary On The Whole Bible

Fruits (better, fruit) meet for repentance. — The English version is ambiguous and not happy, suggesting the thought of the “fruit” as preparing the way for repentance. The thought is, however, “by coming to the baptism you profess repentance; bring forth, therefore, fruit worthy of repentance — i.e., of a changed heart and will.”