Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.2.20

5.2.2.20

taddhaike | etatkṛtvāthaitatkurvanti tadu tathā na kuryādātmā vai stotram prajā śastrametasmāddha sa yajamānam praṇāśayati sa jihma eti sa hvalati tasmādetadeva kṛtvāthaitatkuryāt

Here now some, having performed that, perform that; but let him not do it thus; for the Stotra is his (the Sacrificer's) own self, and the Sastra is his people (or offspring): thereby then he ruins the Sacrificer; he goes astray, he stumbles;--hence having performed that, let him perform that:--