'Undisciplined' in the Bible

But we command you, brothers and sisters, in the name of our Lord Jesus Christ, to keep away from any brother who lives an undisciplined life and not according to the tradition they received from us.

For you yourselves know how you ought to follow our example, because we did not act in an undisciplined manner among you,

For we hear that some among you are leading an undisciplined life, doing no work at all, but acting like busybodies.