Strong's Greek #264
ἁμαρτησάντων

Englishman's Concordance (References)

ἁμαρτησάντων hamartēsantōn — 1 Occurrence

2 Peter 2:4 - V-APA-GMP
GRK:θεὸς ἀγγέλων ἁμαρτησάντων οὐκ ἐφείσατο
NAS: angels when they sinned, but cast them into hell
KJV: the angels that sinned, but
INT: God [the] angels having sinned not spared