Aitareyabrahmana 6.5

6.5

stotriyaṃ stotriyasyānurūpaṃ kurvanti prātaḥsavane,
'har eva tad ahno 'nurūpaṃ kurvanty,
avareṇaiva tad ahnā param ahar abhyārabhante
'tha tathā na madhyaṃdine.
śrīr vai pṛṣṭhāni,
tāni tasmai na tasthānāni yat stotriyaṃ stotriyasyānurūpaṃ kuryus
tayaiva vibhaktyā tṛtīyasavane na stotriyaṃ stotriyasyānurūpāṃ kurvanti

vi. 5 (xxvii. 2). They make the strophe the antistrophe of the strophe

at the morning pressing; verily thus they make one day the counterpart of the other; verily thus by the preceding day they lay hold of the subsequent day. But this is not the case at the midday (pressing); the Pṛṣṭhas are prosperity; they have not the position for the purpose of making the strophe the antistrophe of the strophe. By reason of the same distinction they do not at the third pressing make the strophe the antistrophe of the strophe.