मयि सर्वाणि कर्माणि संन्यस्याध्यात्मचेतसा। निराशीर्निर्ममो भूत्वा युध्यस्व विगतज्वरः
mayi sarvāṇi karmāṇi sannyasyādhyātma-chetasā nirāśhīr nirmamo bhūtvā yudhyasva vigata-jvaraḥ
Therefore, surrender your actions to Me, keep your thoughts focused on the Absolute, free from selfishness and without expecting a reward, with a mind free from excitement, begin to fight.
Translated by Shri Purohit Swami
Renouncing all actions in Me, with the mind centered on the Self, free from hope and egoism, and from mental fever, fight thou.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
mayi—unto me; sarvāṇi—all; karmāṇi—works; sannyasya—renouncing completely; adhyātma-chetasā—with the thoughts resting on God; nirāśhīḥ—free from hankering for the results of the actions; nirmamaḥ—without ownership; bhūtvā—so being; yudhyasva—fight; vigata-jvaraḥ—without mental fever