One verse

Srimad Bhagavatam 11.6.47

11.6.47

वातवसना य ऋषय: श्रमणा ऊर्ध्वमन्थिन: । ब्रह्माख्यं धाम ते यान्ति शान्ता: सन्न्यासीनोऽमला: ॥ ४७ ॥

vāta-vasanā ya ṛṣayaḥ śramaṇā ūrdhra-manthinaḥ brahmākhyaṁ dhāma te yānti śāntāḥ sannyāsino ’malāḥ

vāta-vasanāḥ
dressed by the air (naked)
ye
those who are
ṛṣayaḥ
sages
śramaṇāḥ
strict observers of spiritual practices
ūrdhva-manthinaḥ
who have conserved their semen to the point that it has risen up to their heads
brahma-ākhyam
known as Brahman
dhāma
the (impersonal) spiritual abode
te
they
yānti
to go
śāntāḥ
peaceful
sannyāsinaḥ
members of the renounced order of life
amalāḥ
sinless

Naked sages who seriously endeavor in spiritual practice, who have raised their semen upward, who are peaceful and sinless members of the renounced order, attain the spiritual abode called Brahman.