Śatapatha Brāhmaṇa ("of a hundred paths") 7.2.4.10

7.2.4.10

sa vai kṛṣṭe ninayati | prāṇeṣu tadapo dadhāti sa yatkṛṣṭa eva ninayennākṛṣṭe prāṇeṣvevāpaḥ syurnetarasminnātmannatha yadakṛṣṭa eva ninayenna kṛṣṭa ātmannevāpaḥ syurna prāṇeṣu kṛṣṭe cākṛṣṭe ca ninayati tasmādimā ubhayatrāpaḥ prāṇeṣu cātmaṃśca

On the ploughed ground he pours it: he thereby puts water into the vital airs. But were he to pour (water) only on the ploughed ground, and not on the unploughed, there would be water only in (the channels of) the vital airs, and not in the other (parts of the) body. And were he to pour (water) only on the unploughed ground, and not on the ploughed, there would be water only in (the other parts of) the body, and not in the vital airs. He pours it both on the ploughed, and the unploughed, ground, whence there is water here both in (the channels of) the vital airs and in the body.