Bhagavad Gita, Chapter 16, Verse 24

तस्माच्छास्त्रं प्रमाणं ते कार्याकार्यव्यवस्थितौ । ज्ञात्वा शास्त्रविधानोक्तं कर्म कर्तुमिहार्हसि

tasmācchāstraṃ pramāṇaṃ te kāryākāryavyavasthitau | jñātvā śāstravidhānoktaṃ karma kartumihārhasi

Translation

Therefore, the scripture is thy authority in deciding as to what ought to be done and what ought not to be done. Now, thou oughtest to know and perform thy duty laid down in the scripture-law.

— Alladi Mahadeva Sastri

Word meanings

tasmāt

therefore

śāstram

Shāstra

pramāṇam

authority

te

of thee

kāryākāryavyavasthitau

of duty, and, of non-duty, and, in the determination

jñātvā

having known

śāstravidhānoktam

of Shāstra, by the rule, spoken

karma

action

kartum

to do

iha

here

arhasi

oughtest

Śaṅkarācārya's commentary

Authority: source of knowledge. Scripture-Law: the scripture itself is the Law, which says "thou shalt act so and so, thou shalt not act so and so." "Now" refers to the stage where the disciple is fit for Karma-Yoga.