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.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
वातरशना य ऋषयः श्रमणा ऊर्ध्वमन्थिनः । ब्रह्माख्यं धाम ते यान्ति शान्ताः सन्न्यासिनोऽमलाः
vātaraśanā ya ṛṣayaḥ śramaṇā ūrdhvamanthinaḥ | brahmākhyaṃ dhāma te yānti śāntāḥ sannyāsino'malāḥ
SB 11.6.47