ŚVETĀŚVATARA UPANISHAD · 3.18

नवद्वारे पुरे देही हंसो लेलायते बहिः ।
वशी सर्वस्य लोकस्य स्थावरस्य चरस्य च ॥

navadvāre pure dehī haṃso lelāyate bahiḥ ।
vaśī sarvasya lokasya sthāvarasya carasya ca ॥

The embodied spirit within the town with nine gates, the bird, flutters outwards, the ruler of the whole world, of all that rests and of all that moves.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)