Chapter 13 · verse 10 · gita.yoga.org

Bhagavad Gita 13.10

असक्तिरनभिष्वङ्गः पुत्रदारगृहादिषु।नित्यं च समचित्तत्वमिष्टानिष्टोपपत्तिषु

Non-attachment, non-identification of the Self with son, wife, home, and the rest, and constant even-mindedness in the face of the attainment of both desirable and undesirable.