Narayana Sūkta 06 and 07

अनन्तं अव्ययं कविं समुद्रेन्तं विश्वशंभुवम्। पद्म कोश प्रतीकाशं हृदयं च अपि अधोमुखम्॥

अधो निष्ठ्या वितस्त्यान्ते नाभ्याम् उपरि तिष्ठति। ज्वालामालाकुलं भाती विश्वस्यायतनं महत्॥

He is endless and indestructible like the ocean, and is the origin of the universe. In the heart, resembling downward facing lotus covering, below the Adam's apple, a measure of finger span from its edge, surrounded by fire, glowing, above the navel, stands the abode of the great lord of the universe.