The Vedanta Sutras of Badarayana, Commentary by Sankara (SBE38), tr. by George Thibaut  at sacred-texts.com
7. And on account of definite rules.
'Performing works here (i.e. in this life) let a man wish to live a hundred years; thus work will not cling to thee, man; there is no other way than that' (Îsa. Up. 2); 'The
[paragraph continues] Agnihotra is a sattra lasting up to old age and death; for through old age one is freed from it or through death' (Sat. Brâ. XII, 4, 1, 1); from such definite rules also it follows that knowledge is merely supplementary to works.
Against all these objections the Sûtrakâra upholds his view in the following Sûtra.