Śatapatha Brāhmaṇa ("of a hundred paths") 3.3.4.7

3.3.4.7

sa paryāṇahyati | vaneṣu vyantarikṣaṃ tatāneti vaneṣu hīdamantarikṣaṃ vitataṃ vṛkṣāgreṣu vājamarvatsu paya usriyāsviti vīryaṃ vai vājāḥ pumāṃso 'rvantaḥ puṃsvevaitadvīryaṃ dadhāti paya usriyāsviti payo hīdamusriyāsu hitaṃ hṛtsu kratuṃ varuṇo vikṣvagnimiti hṛtsu hyayaṃ kraturmanojavaḥ praviṣṭo vikṣvagnimiti vikṣu hyayam prajāsvagnirdivi sūryamadadhātsomamadrāviti divi hyasau sūryo hitaḥ somamadrāviti giriṣu hi somastasmādāha divi sūryamadadhātsomamadrāviti

He wraps him up, with the text (Vâg. S. IV, 31; Rig-veda V, 85, 2), 'Over the woods he hath stretched the welkin,' for over the woods, over the tops of the trees, that welkin (or air) is indeed stretched;--'strength (hath he laid) into the coursers, milk into the kine,'--strength means manliness and the coursers are the men: he thereby bestows manliness upon men; and 'milk into the kine' he says, because this milk is indeed contained in the kine;--'Into the hearts Varuna (hath laid) wisdom, into the homesteads fire;' for into the hearts that wisdom, the swiftness of thought, has indeed entered; and 'into the homesteads fire' he says, because that fire is in the homesteads, with the people;--'Into the heaven hath he placed the Sun, and Soma upon the rock;' for that sun is indeed placed in the heaven; and 'Soma on the rock' he says, because Soma is in the mountains. This is why he says, 'In the heaven hath he placed the Sun, and Soma upon the rock.'