Woe unto the people hiding their secrets in the source code.
Immediately upon taking over the company, the Information Technology people exactingly went over the source code.
What saying is hidden in this sentence?
Hint the First:
After manipulation, usage of homophones occurs, and the hidden saying is shorter than this sentence.
Hint the Second:
Starting with words which seem forced into the sentence is probably a strong technique. The final phrase is 5 words long.