One verse

Srimad Bhagavatam 11.3.49

11.3.49

शुचि: सम्मुखमासीन: प्राणसंयमनादिभि: । पिण्डं विशोध्य सन्न्यासकृतरक्षोऽर्चयेद्धरिम् ॥ ४९ ॥

śuciḥ sammukham āsīnaḥ prāṇa-saṁyamanādibhiḥ piṇḍaṁ viśodhya sannyāsa- kṛta-rakṣo ’rcayed dharim

śuciḥ
clean
sammukham
facing (the Deity)
āsīnaḥ
thus seated
prāṇa-saṁyamana-ādibhiḥ
by prāṇāyāma (breathing exercises) and other means
piṇḍam
the gross body
viśodhya
purifying
sannyāsa
by placing transcendental marks of tilaka on various places of the body
kṛta-rakṣaḥ
in this way invoking the Lord’s protection
arcayet
one should worship
harim
Lord Hari

After cleansing oneself, purifying the body by prāṇāyāma, bhūta-śuddhi and other processes, and marking the body with sacred tilaka for protection, one should sit in front of the Deity and worship the Supreme Personality of Godhead.