Baudhayanagrihyasutra 2.18.9

Baudhāyanagṛhyasūtra 2.18.9

atha rudragāyatrīṃ japet tatpuruṣāya vidmahe ityetāṃ raudrīṃ sahasrakṛtva āvartayecchatakṛtvo 'parimitakṛtvo vā daśāvaram \9\