Śatapatha Brāhmaṇa ("of a hundred paths") 13.6.2.19

13.6.2.19

atha yadi brāhmaṇo yajet sarvavedasaṃ dadyātsarvam vai brāhmaṇaḥ sarvaṃ sarvavedasaṃ sarvam puruṣamedhaḥ sarvasyāptyai sarvasyāvaruddhyai

And if a Brâhmana performs the sacrifice, he should bestow all his property in order to obtain and secure everything, for the Brâhmana is everything, and all one's property is everything, and the Purushamedha is everything.