Brahma Sutras
ॐ सहकार्यन्तरविधिः पक्षेण तृतीयं तद्वतो विद्यादिवत् ॐ ॥ ३-४-४७॥
In case of a partial application to knowledge by one possessed of (imperfect) knowledge, an injunction is implied in another auxiliary which is the third; this is like the main injunction being applied to the subsidiary acts.
english translation
OM sahakAryantaravidhiH pakSeNa tRtIyaM tadvato vidyAdivat OM ॥ 3-4-47॥
hk transliteration by Sanscript