सहस्राणि पादा अस्येति सहस्रपात् ।'सहस्रशीर्षा पुरुषः ।सहस्राक्षः सहस्रपात्' इति श्रुतेः ॥
In plain words
A thousand feet are his — and so he is called Sahasrapāt, the Thousand-Footed. The śruti itself says it: "The Puruṣa has a thousand heads; a thousand eyes, a thousand feet."
Close to the Sanskrit
"Thousands are his feet" — thus, Sahasrapāt. Because of the śruti: "The Puruṣa is thousand-headed; thousand-eyed, thousand-footed."