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.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
शुचिः सम्मुखमासीनः प्राणसंयमनादिभिः । पिण्डं विशोध्य सन्न्यासकृतरक्षोऽर्चयेद्धरिम्
śuciḥ sammukhamāsīnaḥ prāṇasaṃyamanādibhiḥ | piṇḍaṃ viśodhya sannyāsakṛtarakṣo'rcayeddharim
SB 11.3.49