One verse

Srimad Bhagavatam 11.3.50-51

11.3.50-51

अर्चादौ हृदये चापि यथालब्धोपचारकै: । द्रव्यक्षित्यात्मलिङ्गानि निष्पाद्य प्रोक्ष्य चासनम् ॥ ५० ॥ पाद्यादीनुपकल्प्याथ सन्निधाप्य समाहित: । हृदादिभि: कृतन्यासो मूलमन्त्रेण चार्चयेत् ॥ ५१ ॥

arcādau hṛdaye cāpi yathā-labdhopacārakaiḥ dravya-kṣity-ātma-liṅgāni niṣpādya prokṣya cāsanam pādyādīn upakalpyātha sannidhāpya samāhitaḥ hṛd-ādibhiḥ kṛta-nyāso mūla-mantreṇa cārcayet

arcā-ādau
in the form of the Deity and His paraphernalia
hṛdaye
in the heart
ca api
also
yathā-labdha
whatever is available
upacārakaiḥ
with ingredients of worship
dravya
the physical items to be offered
kṣiti
the ground
ātma
one’s own mind
liṅgāni
and the Deity
niṣpādya
preparing
prokṣya
sprinkling with water for purification
ca
and
āsanam
one’s seat
pādya-ādīn
the water for bathing the Deity’s feet and other offerings
upakalpya
getting ready
atha
then
sannidhāpya
placing the Deity in His proper place
samāhitaḥ
concentrating one’s attention
hṛt-ādibhiḥ
on the Deity’s heart and other places of the body
kṛta-nyāsaḥ
having drawn sacred marks
mūla-mantreṇa
with the appropriate basic mantra for worshiping the particular Deity
ca
and
arcayet
one should offer worship

The devotee should gather whatever ingredients for worshiping the Deity are available, make ready the offerings, the ground, his mind and the Deity, sprinkle his sitting place with water for purification and prepare the bathing water and other paraphernalia. The devotee should then place the Deity in His proper place, both physically and within his own mind, concentrate his attention, and mark the Deity’s heart and other parts of the body with tilaka. Then he should offer worship with the appropriate mantra.