Shiva Purana
प्रणवो हि परः साक्षात्परमेश्वरवाचकः ॥ वाच्यः पशुपतिर्देवः पशूनां पाशमोचकः ॥ ४७ ॥
Praṇava is the word that expresses lord Śiva. Lord Paśupati is the goal, the releaser of the bondage of the Paśus, the individual souls.
english translation
praNavo hi paraH sAkSAtparamezvaravAcakaH ॥ vAcyaH pazupatirdevaH pazUnAM pAzamocakaH ॥ 47 ॥
hk transliteration by Sanscript