Chāndogya Upaniṣad 2.24.2

2.24.2

kva tarhi yajamānasya loka iti \
sa yas taṃ na vidyāt kathaṃ kuryāt \
atha vidvān kuryāt \\224.2\

If one knows not, how can he perform [the sacrifice with success]? So let him who knows perform.

1. The expounders of sacred knowledge (brahmavādin) say: 'Since to the Vasus belongs the morning Soma-libation, to the Rudras the mid-day Soma-libation, to the Ādityas and the Viśvadevas the third Soma-libation, where, then (tarhi), is the sacrificer's world?'