Bhagavad Gita Chapter 2.57
yaḥ sarvatrānabhisnehas
tat tat prāpya śubhāśubham
nābhinandati na dveṣṭi
tasya prajñā pratiṣṭhitā
Translation
In the material world, one who is unaffected by whatever good or evil he may obtain, neither praising it nor despising it, is firmly fixed in perfect knowledge.