Hiranyakeshigrihyasutra 2.8.18.7

2.8.18.7

sviṣṭakṛdantaṃ kṛtvā tryahamekāhaṃ vā kṣamya yathādhyāyamadhyetavyamiti vadanti \7\

After all rites down to the Svishtakrit oblation have been performed, they stop studying three days or one day; then they should go on studying so as to commence where they have broken off: so say the teachers.