Śatapatha Brāhmaṇa ("of a hundred paths") 7.2.4.23

7.2.4.23

sa vai kṛṣṭe vapati | prāṇāṃstadbhiṣajyati sa yatkṛṣṭa eva vapennākṛṣṭe prāṇāneva bhiṣajyennetaramātmānamatha yadakṛṣṭa eva vapenna kṛṣṭa ātmānameva bhiṣajyenna prāṇānkṛṣṭe cākṛṣṭe ca vapati prāṇāṃśca tadātmānaṃ ca bhiṣajyati

On the ploughed ground he sows: he thereby heals the vital airs. And were he to sow only on the ploughed ground, and not on the unploughed, he would only heal the vital airs, and not the other (parts of the) body; and were he to sow only on the unploughed, and not on the ploughed, ground, he would only heal the body, and not the vital airs: he sows both on the ploughed, and on the unploughed, ground; and thus he heals both the vital airs and the body.