Śatapatha Brāhmaṇa ("of a hundred paths") 8.1.2.3

8.1.2.3

jamadagnirṛṣiriti | cakṣurvai jamadagnirṛṣiryadenena jagatpaśyatyatho manute tasmāccakṣurjamadagnirṛṣiḥ prajāpatigṛhītayā tvayeti prajāpatisṛṣṭayā tvayetyetaccakṣurgṛhṇāmi prajābhya iti cakṣuḥ paścātprāpādayata nānopadadhāti ye nānākāmāścakṣuṣi tāṃstaddadhāti sakṛtsādayatyekaṃ taccakṣuḥ karotyatha yannānā sādayeccakṣurha vicindyātsaiṣā trivṛdiṣṭakā tasyokto bandhuḥ

'The Rishi Gamadagni,'--the Rishi Gamadagni, doubtless, is the eye: inasmuch as thereby the world of the living (gagat) sees and thinks, therefore the Rishi Gamadagni is the eye.--'By thee, taken by Pragâpati,'--that is, 'by thee, created by Pragâpati,'--'I take the eye for my descendants,' therewith he introduced the eye from behind. Separately he lays down (these ten bricks): what separate desires there are in the eye those he thereby lays into it. Only once he settles them: he thereby makes this eye one; but were he to settle them each separately, he assuredly would cut the eye asunder. This is a threefold brick: the meaning of this has been explained.