Matthew 11:21
[He said] "It will be too bad for you, Chorazin! It will be too bad for you, Bethsaida! For if the powerful miracles had been performed in [the cities of] Tyre and Sidon which were performed in your presence, they would have repented long ago, [demonstrating it] by wearing sackcloth [i.e., a coarse cloth made of goat hair] and throwing ashes [into the air].
Luke 10:13
"It is too bad for you, Chorazin! It is too bad for you, Bethsaida! For if the powerful miracles had been performed in Tyre and Sidon which were performed in your presence, they would have repented long ago by sitting in ashes and wearing sackcloth. [Note: This sackcloth was a coarse cloth made of goat hair and indicated deep remorse or mourning].
Luke 15:18-19
I will get up and go to my father and say to him, Father, I have sinned against [the God of] heaven and against you.
1 Corinthians 15:8-9
Then last of all, He appeared to me also, as someone born abnormally. [Note: This probably refers to Paul being converted later than the rest of the apostles].
1 Timothy 1:13-16
[even] though I had previously spoken against Christ, and persecuted [Christians] and acted outrageously. However, I obtained mercy because I acted out of ignorance, not believing [in Christ].
James 4:7-10
So, you should submit yourselves to God, but oppose the devil, and he will flee from you.