SB 4.29.12
apano vyavaharo ’tra
citram andho bahudanam
pitrhur daksinah karna
uttaro devahuh smrtah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The city called Apana represents engagement of the tongue in speech, and Bahudana is the variety of foodstuffs. The right ear is called the gate of Pitrhu, and the left ear is called the gate of Devahu.