Bhagavad Gita · 13.10

असक्तिरनभिष्वङ्गः पुत्रदारगृहादिषु।नित्यं च समचित्तत्वमिष्टानिष्टोपपत्तिषु॥

asaktir anabhiṣhvaṅgaḥ putra-dāra-gṛhādiṣhu nityaṁ cha sama-chittatvam iṣhṭāniṣhṭopapattiṣhu

Non-attachment and absence of excessive affection for son, wife, home, and the like; constant equanimity upon obtaining the desirable and the undesirable —

— Bhagavad Gita 13.10

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)