Valmiki Ramayana Aranya Kanda Sarga 69 Shloka 27

ततः then, तौ उभौ both of them, तत्र there, प्रमुखे in front, स्थितम् stood, विवृद्धम् very well grown, अशिरोग्रीवम् without head and neck, उदरे मुखम् with his face in the stomach, कबन्धम् trunk, आसेदतुः reached.

Then both the brothers saw a very tall figure with a trunk that stood facing them. He had neither neck nor head. His face was in the stomach.