Satapatha Brahmana Part IV (SBE43), Julius Eggeling tr. [1897], at sacred-texts.com
10:3:1:11. The Gâyatrî is the breath (of Pragâpati, the altar), the Ushnih the eye, the Anushtubh the voice, the Brihatî the mind, the Paṅkti the ear; the Trishtubh is that generative breath; and the Gagatî
that downward breathing;--these are the seven metres increasing by four (syllables) each 1, which are produced in Agni (the fire-altar).
10:3:1:22. 'The Gâyatrî is the breath,'--thus, whatever power, whatever vigour there is in the breath that is this one thousand; and to the breath, indeed, this vigour belongs; for were the breath of him who builds it to pass away, this fire-altar, assuredly, would not be built: by this its form that (altar) becomes built (so as to contain) a thousand Gâyatrîs.
10:3:1:33. 'The Ushnih is the eye,'--thus, whatever power, whatever vigour there is in the eye that is this one thousand; and to the eye, indeed, this vigour belongs, for were the eye-sight of him who builds it to pass away, this fire-altar, assuredly, would not be built: by this its form that (altar) becomes built (so as to contain) a thousand Ushnihs.
10:3:1:44. 'The Anushtubh is the voice,'--thus, whatever power, whatever vigour there is in the voice that is this one thousand; and to the voice, indeed, this vigour belongs, for were the voice of him who builds it to pass away, this fire-altar, assuredly, would not be built: by this its form that (altar) becomes built (so as to contain) a thousand Anushtubhs.
10:3:1:55. 'The Brihatî is the mind,'--thus, whatever power, whatever vigour there is in the mind that is this one thousand; and to the mind, indeed, this vigour belongs, for were the mind of him who builds it to pass away, this fire altar, assuredly,
would not be built: by this its form that (altar) becomes built (so as to contain) a thousand Brihatîs.
10:3:1:66. 'The Paṅkti is the ear,'--thus, whatever power, whatever vigour there is in the ear that is this one thousand; and to the ear, indeed, this vigour belongs, for were the power of hearing of him who builds it to pass away, this fire-altar, assuredly, would not be built: by this its form that (altar) becomes built (so as to contain) a thousand Paṅktis.
10:3:1:77. 'The Trishtubh is that generative (life-giving) breath,'--thus, whatever power, whatever vigour there is in that breath, that is this one thousand; and to that breath, indeed, this vigour belongs, for were that breath of him who builds it to become disordered, this fire-altar, assuredly, would not be built: by this its form that (altar) becomes built (so as to contain) a thousand Trishtubhs.
10:3:1:88. 'And the Gagatî is that downward breathing,'--thus, whatever power, whatever vigour there is in that breathing, that is this one thousand; and to that breathing, indeed, this vigour belongs, for were that breathing of him who builds it to become disordered, this fire-altar, assuredly, would not be built: by this its form that (altar) becomes built (so as to include) a thousand Gagatîs.
10:3:1:99. Now, these seven metres which increase by four (syllables) successively, and are firmly established in one another, are those seven vital airs 1 in man, firmly established in one another: thus, by
as much as the number of metres he utters has that (altar) of him who knows this, prayers uttered upon it in metre after metre, or hymns chanted, or sastras recited, or (bricks) laid down upon it.
328:1 The Gâyatrî verse consists of twenty-four syllables; and each of the following increases by four syllables, the Gagatî consisting of 4 × 12, or forty-eight syllables.
329:1 Viz. those enumerated in the preceding paragraphs, including those passing through the eye, ear, &c.