G3588 "mysteries"

G3588 — ho hē to (ho hay to) ὁ ἡ τό: The masculine feminine (second) and neuter (third) forms in all their inflections; the definite article;
the (sometimes to be supplied at others omitted in English idiom): - the this that one he she it etc.

Matthew 13 [.mp3]

¹¹He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.

Luke 8 [.mp3]

¹⁰And he said, Unto you it is given to know the mysteries of the kingdom of God: but to others in parables; that seeing they might not see, and hearing they might not understand.

1 Corinthians 13 [.mp3]

²And though I have the gift of prophecy, and understand all mysteries, and all knowledge; and though I have all faith, so that I could remove mountains, and have not charity, I am nothing.