Bhagavad Gita Chapter 12.17
yo na hṛṣyati na dveṣṭi
na śocati na kāńkṣati
śubhāśubha-parityāgī
bhaktimān yaḥ sa me priyaḥ
Translation
One who neither rejoices nor grieves, who neither laments nor desires, and who renounces both auspicious and inauspicious things—such a devotee is very dear to Me.