2 Pet 2:4

Εἰ γὰρ ὁ θεὸς ἀγγέλων ἁμαρτησάντων οὐκ ἐφείσατο, ἀλλὰ ⸀σειραῖς ζόφου ταρταρώσας παρέδωκεν εἰς κρίσιν τηρουμένους,

For if God did not spare the angels when they sinned, but cast them deep into hell, placing them in chains of darkness to be held for judgment;