Verses with the word mysteries in the Apocrypha (4 verses):

Wisdom of Solomon 2:22
As for the mysteries of God, they knew them not: neither hoped they for the wages of righteousness, nor discerned a reward for blameless souls.

Wisdom of Solomon 6:22
As for wisdom, what she is, and how she came up, I will tell you, and will not hide mysteries from you: but will seek her out from the beginning of her nativity, and bring the knowledge of her into light, and will not pass over the truth.

Wisdom of Solomon 8:4
For she is privy to the mysteries of the knowledge of God, and a lover of his works.

Sirach 3:19
Many are in high place, and of renown: but mysteries are revealed unto the meek.