Yāska's Nirukta 19.3.7

19.3.7

ayameva cāgniṣṭome "dadhikrāvṇo akāriṣamityāmikṣe dadhi bhakṣayanti ( ā0 sū0 6, 13 )"-iti dadhibhakṣaṇe, tathā cāśvamedhe "dadhikrāvṇo akāriṣamityutthitāyāṃ sarvā japanti"ityaśvasaṃnidhāvenaṃ patnyo japanti mahiṣyāmutthitāyām | tatraivaṃ sati prativiniyogamasyānenārthena bhavitavyam | ta ete vakturabhiprāyavaśādanyatvamapi bhajante mantrāḥ | na hi eteṣu arthasyeyattāvadhāraṇamasti, mahārthā hyete duṣparijñānāśca | yathāśvārohavaiśiṣṭyādaśvaḥ sādhuḥ sādhutaraśca vahati, evamete vaktṛvaiśiṣṭyāt sādhūn sādhutarāṃścārthān sravanti | tatraivaṃ sati lakṣaṇoddeśamātramevaitasmiñchāstre nirvacanamekaikasya kriyate, kacitcā ādhyātmyadhidaivādhiyajñopadarśanārtham | tasmādeteṣu yāvanto'rthā upapadyeran-ādhidaivādhyātmyādhiyajñāśrayāḥ sarva eva te yojyāḥ, nātrāparādho'sti 2 | 8 |