Maya, Pashus and Pashupati

वायवीयसंहितायामुत्तरभागे कृष्णपुत्रप्राप्तिवर्णनं नाम द्वितीयोऽध्यायः

Vayaviya Samhita, Later/north part, Lord Krishna's son obtaining
description Chapter 2

उपमन्युरुवाच |

Upamanyu said (to Lord Krishna)

ब्रह्माद्याः स्थावरांताश्च देवदेवस्य शूलिनः |
पशवः परिकीर्त्यंते संसारवशवर्तिनः || 11 ||
तेषां पतित्वाद्देवेशः शिवः पशुपतिः स्मृतः |
मलमायादिभिः पाशैः स बध्नाति पशून्पतिः || 12 ||
स एव मोचकस्तेषां भक्त्या सम्यगुपासितः | 13

From Lord Brahma to stationary things, under the control of the
material world (or Maya), are called the "pashus" of Lord Shiva, the
God of the Devas.
Because of his lordship over them, Lord Shiva is considered to be the
"Pashupati". The Lord ties/binds the "pashus" with the cord of Maya
(the illusion causing power), dirt, etc.
He only is their liberator, (if) worshipped properly by devotion.