Verses with the word privy in the Old Testament (3 verses):

Deuteronomy 23:1
He that is wounded in the stones, or hath his privy member cut off, shall not enter into the congregation of the LORD.

1 Kings 2:44
The king said moreover to Shimei, Thou knowest all the wickedness which thine heart is privy to, that thou didst to David my father: therefore the LORD shall return thy wickedness upon thine own head;

Ezekiel 21:14
Thou therefore, son of man, prophesy, and smite thine hands together. and let the sword be doubled the third time, the sword of the slain: it is the sword of the great men that are slain, which entereth into their privy chambers.