ὑπὸ σκότου

From LSJ

μακάριοι οἱ πτωχοί τῷ πνεύματι ὄτι αὐτῶν ἐστὶν ἡ βασιλεία τῶν οὐρανῶν → blessed are the poor in spirit, for theirs is the kingdom of heaven (Matthew 5:3)

Source

Dutch (Woordenboekgrieks.nl)

in duisternis, in het geheim