karyam ity eva yat karma niyatam kriyate ’rjuna। sangam tyaktva phalam chaiva sa tyagah sattviko matah॥ 18.9 ॥

Sri Krishna said: O Arjuna,  when one performs his prescribed duty only because it ought to be done, and renounces all material association and all attachment to the fruit, his renunciation is said to be in the mode of goodness.

na dvesty akusalam karma kusale nanusajjate। tyagi sattva-samavisto medhavi chinna-samsayah॥ 18.10 ॥

Sri Krishna said: O Arjuna, The intelligent renouncer situated in the mode of goodness, neither hateful of inauspicious work nor attached to auspicious work, has no doubts about work.

na hi deha-bhrta sakyam tyaktum karmany asesatah। yas tu karma-phala-tyagi sa tyagity abhidhiyate॥ 18.11 ॥

Sri Krishna said: O Arjuna, It is indeed impossible for an embodied being to give up all activities. But he who renounces the fruits of action is called one who has truly renounced.

anistam istam misram cha tri-vidham karmanah phalam। bhavaty atyaginam pretya na tu sannyasinam kvacit॥ 18.12 ॥

Sri Krishna said: O Arjuna, For one who has not renounced, the threefold fruits of action—desirable, undesirable and mixed—accrue after death. But those who are in the renounced order of life have no such result to suffer or enjoy.