1 Timothy 3:6

3:6 He must not be a recent convert or he may become arrogant ¹  and fall into the punishment that the devil will exact. ² 

1 Timothy 6:4

6:4 he is conceited and understands nothing, but has an unhealthy interest in controversies and verbal disputes. This gives rise to envy, dissension, slanders, evil suspicions,

[3:6]  ¹ tn Grk “that he may not become arrogant.”

[3:6]  ² tn Grk “the judgment of the devil,” which could also mean “the judgment that the devil incurred.” But see 1 Tim 1:20 for examples of the danger Paul seems to have in mind.