Śatapatha Brāhmaṇa ("of a hundred paths") 7.5.2.39

7.5.2.39

tvaṃ yaviṣṭha dāśuṣa iti | yajamāno vai dāśvānnṛḥ pāhīti manuṣyā vai naraḥ śṛṇudhī gira iti śṛṇu na imāṃ stutimityetadrakṣā tokamuta tmaneti prajā vai tokaṃ rakṣa prajāṃ cātmānaṃ cetyetat

[Vâg. S. XIII, 52; Rik S. VIII, 84, 3] 'Shield thou, O youngest, the men of the liberal worshipper!' the liberal worshipper is the Sacrificer, and the men are the people;--'hear thou the songs!' that is, hear this hymn of praise!--'protect thou kin and self!' the kin (race) means offspring: thus, 'protect both (the Sacrificer's) offspring and himself.'