Verse
कामक्रोधवियुक्तानां यतीनां यतचेतसाम् ।अभितो ब्रह्मनिर्वाणं वर्तते विदितात्मनाम् ॥
Yatis (those who practice self-mastery by Yoga and austerity) who are delivered from desire and wrath and have gained self-mastery, for them Nirvana in the Brahman exists all about them, encompasses them, they already live in it because they have knowledge of the Self.
Gītā 5·26