This speculation on Purusha, O king, occurs in all the Vedas. It is well-known to be at one with Rita and Truth. The foremost of Rishis, viz., Vyasa, has thought upon it.
इदं पुरुषसूक्तं हि सर्ववेदेषु पार्थिव। ऋतं सत्यं च विख्यातमृषिसिंहेन चिन्तितम्॥