Bhagavad Gita Chapter 5.19
ihaiva tair jitaḥ sargo
yeṣāḿ sāmye sthitaḿ manaḥ
nirdoṣaḿ hi samaḿ brahma
tasmād brahmaṇi te sthitāḥ
Translation
Those whose minds are established in sameness and equanimity have already conquered the conditions of birth and death. They are flawless like Brahman, and thus they are already situated in Brahman.