the ear
Job 6:30
Is there in my tongue perverseness? Discerneth not my palate desirable things?
Job 12:11
Doth not the ear try words? And the palate taste food for itself?
1 Corinthians 2:15
and he who is spiritual, doth discern indeed all things, and he himself is by no one discerned;
Hebrews 5:14
and of perfect men is the strong food, who because of the use are having the senses exercised, unto the discernment both of good and of evil.
mouth
Job 31:30
Yea, I have not suffered my mouth to sin, To ask with an oath his life.
Job 33:2
Lo, I pray thee, I have opened my mouth, My tongue hath spoken in the palate.