UtshovBhagavad Gita 5.20
न प्रहृष्येत्प्रियं प्राप्य नोद्विजेत्प्राप्य चाप्रियम्।
स्थिरबुद्धिरसम्मूढो ब्रह्मविद्ब्रह्मणि स्थितः।।5.20।।
Na prahrishyetpriyam prapya nodvijetprapya chapriyam
Sthirabuddhirasammudho brahmavidbrahmani sthitah
Simple meaning, written by AIOne should not rejoice upon getting what is pleasant nor be dejected when the unpleasant is not obtained; a person of steady mind, free from delusion, who knows Brahman stays in Brahman.