2 Peter 2:20-21 NIV

20 If they have escaped the corruption of the world by knowing1 our Lord and Savior Jesus Christ2 and are again entangled in it and overcome, they are worse off at the end than they were at the beginning.3

References for 2 Peter 2:20

21 It would have been better for them not to have known the way of righteousness, than to have known it and then to turn their backs on the sacred command that was passed on to them.4

References for 2 Peter 2:21