Aitareyabrahmana 6.2.p5

6.2.p5

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.