Bhagavad Gita 2.48

योगस्थ: कुरु कर्माणि सङ्गं त्यक्त्वा धनञ्जय ।
सिद्ध्यसिद्ध्यो: समो भूत्वा समत्वं योग उच्यते  ॥

yoga-stha: kuru karmāṇi saṅgaṃ tyaktvā dhanañjaya
siddhy-asiddhyo: samo bhūtvā samatvaṃ yoga ucyate – 2.48

Do all your acts, but remaining established in yoga, leaving the usual delusional clinging. Preserve an even attitude to fruition and non-fruition of whatever you do. Such evenness is defined as yoga.