The Vedanta Sutras of Badarayana, Commentary by Sankara (SBE38), tr. by George Thibaut  at sacred-texts.com
3. On account of that (word which indicates origin) being enunciated at first (in connexion with the prânas).
That the scriptural statement about the origin of the
prânas is to be taken in its literal sense just as the statements about the ether, &c., appears from that circumstance also that the one word which (in the passage from the Mu. Up.) indicates origination, viz. 'is born' (gâyate in the first place connected with the prânas and has afterwards to be joined with ether, &c., also ('from him is born breath, mind, and all organs of sense, ether, air,' &c.). Now as it is a settled matter that the phrase 'is born' must be taken in its primary sense with reference to ether and so on, it follows that the origin of the prânas also to which the same word is applied must be understood as a real origin. For it would be impossible to decide that a word enunciated once only in one chapter and one sentence, and connected with many other words, has in some cases to be taken in its primary sense, and in others in a secondary sense; for such a decision would imply want of uniformity.--So likewise in the passage, 'He sent forth prâna, from prâna sraddhâ (Pr. Up. VI, 4), the phrase 'he sent forth' which the text exhibits in conjunction with the prânas has to be carried on to sraddhâ the other things which have an origin.--The same reasoning holds good in those cases where the word expressing origination occurs at the end and has to be connected with the preceding words; as e.g. in the passage ending 'all beings come forth from the Self,' where the word 'come forth' must be connected with the prânas, &c., mentioned in the earlier part of the sentence.