Search the Bible for G3913 in IGNT

παραφρονία
paraphronia
par-af-ron-ee'-ah
From G3912; insanity, that is, foolhardiness

KJV Usage: madness.

2 Peter 2:16 (KJV_Strongs)

16 G1161 But G2192 was [G5627] G1649 rebuked G2398 for his G3892 iniquity G880 : the dumb G5268 ass G5350 speaking [G5674] G1722 with G444 man's G5456 voice G2967 forbad [G5656] G3913 the madness G4396 of the prophet.

2 Peter 2:16 (IGNT)

16 G1649 ελεγξιν G1161 δε But Reproof G2192 (G5627) εσχεν Had G2398 ιδιας Of His Own G3892 παρανομιας Wickedness, G5268 υποζυγιον "the" Beast Of Burden G880 αφωνον Dumb, G1722 εν In G444 ανθρωπου Man's G5456 φωνη Voice G5350 (G5674) φθεγξαμενον Speaking, G2967 (G5656) εκωλυσεν Forbade G3588 την The G3588 του Of The G4396 προφητου Prophet G3913 παραφρονιαν Madness.