

saktāḥ karmaṇyavidvānso yathā kurvanti bhārata
kuryād vidvāns tathāsaktaśh chikīrṣhur loka-saṅgraham
As ignorant people perform their duties with attachment to the results, O scion of Bharat, so should the wise act without attachment, for the sake of leading people on the right path.
Word by Word Meaning:
saktāḥ - attached
karmaṇi - duties
avidvānsaḥ - the ignorant
yathā - as much as
kurvanti - act
bhārata - scion of Bharat (Arjun)
kuryāt - should do
vidvān - the wise
tathā - thus
asaktaḥ - unattached
chikīrṣhuḥ - wishing
loka-saṅgraham - welfare of the world