Matthew 6:7

6:7 When you pray, do not babble repetitiously like the Gentiles, because they think that by their many words they will be heard.

Matthew 11:22-24

11:22 But I tell you, it will be more bearable for Tyre and Sidon on the day of judgment than for you! 11:23 And you, Capernaum, will you be exalted to heaven? No, you will be thrown down to Hades! For if the miracles done among you had been done in Sodom, it would have continued to this day. 11:24 But I tell you, it will be more bearable for the region of Sodom on the day of judgment than for you!”

Matthew 23:33

23:33 You snakes, you offspring of vipers! How will you escape being condemned to hell?

Luke 12:47-48

12:47 That servant who knew his master’s will but did not get ready or do what his master asked will receive a severe beating. 12:48 But the one who did not know his master’s will and did things worthy of punishment will receive a light beating. From everyone who has been given much, much will be required, and from the one who has been entrusted with much, even more will be asked.