One verse

Srimad Bhagavatam 5.17.16

5.17.16

भवानीनाथै: स्त्रीगणार्बुदसहस्रैरवरुध्यमानो भगवतश्चतुर्मूर्तेर्महापुरुषस्य तुरीयां तामसीं मूर्तिं प्रकृतिमात्मन: सङ्कर्षणसंज्ञामात्मसमाधिरूपेण सन्निधाप्यैतदभिगृणन् भव उप-धावति ॥ १६ ॥

bhavani-nathaih stri-ganarbuda-sahasrair avarudhyamano bhagavatas catur-murter maha-purusasya turiyam tamasim murtim prakrtim atmanah sankarsana-samjnam atma-samadhi-rupena sannidhapyaitad abhigrnan bhava upadhavati.

bhavani-nathaih
by the company of Bhavani
stri-gana
of females
arbuda-sahasraih
by ten billion
avarudhyamanah
always being served
bhagavatah catuh-murteh
the Supreme Personality of Godhead, who is expanded in four
maha-purusasya
of the Supreme Person
turiyam
the fourth expansion
tamasim
related to the mode of ignorance
murtim
the form
prakrtim
as the source
atmanah
of himself (Lord Siva)
sankarsana-samjnam
known as Sankarsana
atma-samadhi-rupena
by meditating upon Him in trance
sannidhapya
bringing Him near
etat
this
abhigrnan
clearly chanting
bhavah
Lord Siva
upadhavati
worships

In Ilavrta-varsa, Lord Siva is always encircled by ten billion maidservants of goddess Durga, who minister to him. The quadruple expansion of the Supreme Lord is composed of Vasudeva, Pradyumna, Aniruddha and Sankarsana. Sankarsana, the fourth expansion, is certainly transcendental, but because his activities of destruction in the material world are in the mode of ignorance, He is known as tamasi, the Lord’s form in the mode of ignorance. Lord Siva knows that Sankarsana is the original cause of his own existence, and thus he always meditates upon Him in trance by chanting the following mantra.