न वा, तत्सहभावाश्रुतेः ॥ ६५ ॥
na vā, tatsahabhāvāśruteḥ || 65 ||
na vā—Rather not; tatsahabhāva-aśruteḥ—their correlation not being mentioned by the Sruti.
65. (The meditations connected with members of sacrificial acts are) rather not (to be combined), as the Sruti does not say that they are so correlated.
This and the following Sutra give the conclusion. The rule for combining the instructions regarding sacrifices that are scattered in all the Vedas cannot be applied with respect to the Upasanas connected with them. In the former case, if the instructions are not combined, the sacrifice itself will fail. But not so if the Upasanas are not practised, for Upasanas only enhance the results of the sacrifice. (Vide 3. 3. 42). They are not inseparable from the sacrifice. So they may or may not be practised.