Matthew 10:15
Truly, I say to you, it will be more bearable on the day of judgment for the land of Sodom and Gomorrah than for that town. The comparison to Sodom and Gomorrah is the most severe judgment language in the chapter: the towns of Israel that reject the kingdom's messengers will face a more severe judgment than the most notorious sinners of the Hebrew scriptures. The reason is the light available: Sodom and Gomorrah never had the gospel of the kingdom presented to them by the disciples of Jesus. Greater light creates greater accountability. Luke 12:48 makes the principle explicit: everyone to whom much was given, much will be required.