Romans 2:15
Which show the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;)
Torrey's Topical Textbook—AKJV

1 Timothy 4:2
Speaking lies in hypocrisy; having their conscience seared with a hot iron;
Torrey's Topical Textbook—AKJV