Have nothing to do with godless myths and old wives' tales; rather, train yourself to be godly.
NIV
But refuse and avoid irreverent legends (profane and impure and godless fictions, mere grandmothers' tales) and silly myths, and express your disapproval of them. Train yourself toward godliness (piety), [keeping yourself spiritually fit].
AMP
But refuse profane and old wives' fables, and exercise thyself rather unto godliness.
KJV
In you are slanderers who are bent on shedding blood; in you are those who eat at the mountain shrines and commit lewd acts.
NIV
In you are slanderous men who arouse suspicions to shed blood, and in you are they who have eaten [food offered to idols] upon the mountains; in the midst of you they have committed lewdness.
AMP
In thee are men that carry tales to shed blood: and in thee they eat upon the mountains: in the midst of thee they commit lewdness.
KJV