Acts 15:37-38
Barnabas wished to take with them John, whose other name was Mark;
Luke 9:62
But Jesus answered: "No one who looks back, after putting his hand to the plough, is fitted for the Kingdom of God."
1 Corinthians 15:33
Do not be deceived. 'Good character is marred by evil company.'
Revelation 3:16
But now, because you are lukewarm, neither hot not cold, I am about to spit you out of my mouth.
Revelation 21:8
But as for cowards, unbelievers, the degraded, murderers, the impure, sorcerers, idolaters, and all liars--their place will be in the burning lake of fire and sulphur. That is the Second Death.'