ऊर्ध्वं नाभेर्मेध्यतरः पुरुषः परिकीर्तितः । तस्मान् मेध्यतमं त्वस्य मुखमुक्तं स्वयम्भुवा ॥ ९२ ॥
Man is stated to be purer above the navel (than below); hence the Self-existent (Svayambhu) has declared the purest (part) of him (to be) his mouth.
english translation