B.G 2.48
योगस्थः कुरु कर्माणि सङ्गं त्यक्त्वा धनञ्जय। सिद्ध्यसिद्ध्योः समो भूत्वा समत्वं योग उच्यते ॥२-४८॥
yōgasthaḥ kuru karmāṇi saṅgaṁ tyaktvā dhanañjaya। siddhyasiddhyōḥ samō bhūtvā samatvaṁ yōga ucyatē ॥2-48॥
O Dhananjaya, situated in Yōga, perform prescribed duties without attachment to outcomes. By responding equally to favourable and unfavourable outcomes become equanimous. That only is called Yōga.
Gīta Bhāshya 2.48
'saṅgaṁ' means being anxious for outcomes. Abandoning such anxiety respond equally towards favourable and unfavourable outcomes. To be situated always in such an equanimous state is Yōga.
The topics of the previous verse are further clarified by the 'yōgastha' verse. 'yōgastha' means one who is engaged in the prescribed solution. 'saṅgaṁ' means friendship with outcomes. Abandon friendship with outcomes, which means responding equally towards favourable and unfavourable outcomes. That only is the Yōga taught by me.