Bhagavad Gita 13.9

असक्ितरनभिष्वङ्गः पुत्रदारगृहादिषु।नित्यं च समचित्तत्वमिष्टानिष्टोपपत्तिषु॥

asakिtaranabhiṣvaṅgaḥ putradāragṛhādiṣu |nityaṃ ca samacittatvamiṣṭāniṣṭopapattiṣu ||

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.

Indifference, non-attachment to sex, progeny, or home, equanimity in both good fortune and bad;

Our plain-language meaning of this verse is waiting for scholar review.