Ādittapariyāyasutta

sn35.235:8.1 Forget mutilating the ear faculty with a sharp iron spike, burning, blazing, and glowing!

sn35.235:8.2 I’d better focus on the fact that

sn35.235:8.3 the ear, sounds, ear consciousness, and ear contact are impermanent. And the painful, pleasant, or neutral feeling that arises dependent on ear contact is also impermanent.