“Then he began
To reproach
The cities
In which most
Of his deeds of power
Had been done.
Because they did not repent.”
Τότε ἤρξατο ὀνειδίζειν τὰς πόλεις ἐν αἷς ἐγένοντο αἱ πλεῖσται δυνάμεις αὐτοῦ, ὅτι οὐ μετενόησαν·
These introductory comments against the various Galilean towns are unique to Matthew. Jesus started to denounce or reproach the various towns (Τότε ἤρξατο ὀνειδίζειν τὰς πόλεις) where he had worked his powerful miracles (πόλεις ἐν αἷς ἐγένοντο αἱ πλεῖσται δυνάμεις αὐτοῦ) of healing and curing. However, in those towns, they did not repent (ὅτι οὐ μετενόησαν). Jesus was upset that despite his many miracles, these towns had not repented of their evil ways.
Eugene Finnegan Bible Project 