One verse

Bhagavad Gita 6.15

6.15

युञ्जन्नेवं सदात्मानं योगी नियतमानसः | शान्तिं निर्वाणपरमां मत्संस्थामधिगच्छति ||६-१५||

yuñjannevaṃ sadātmānaṃ yogī niyatamānasaḥ . śāntiṃ nirvāṇaparamāṃ matsaṃsthāmadhigacchati ||6-15||

yuñjan
practicing
evam
as mentioned above
sadā
constantly
ātmānam
body, mind and soul
yogī
the mystic transcendentalist
niyata-mānasaḥ
with a regulated mind
śāntim
peace
nirvāṇa-paramām
cessation of material existence
mat-saṁsthām
the spiritual sky (the kingdom of God)
adhigacchati
does attain
na
never
ati
too much

Thus practicing constant control of the body, mind and activities, the mystic transcendentalist, his mind regulated, attains to the kingdom of God [or the abode of Kṛṣṇa] by cessation of material existence.