Shiva Purana
श्रीकंठेन शिवेनोक्तं शिवायै च शिवागमः ॥ शिवाश्रितानां कारुण्याच्छ्रेयसामेकसाधनम् ॥ ३९ ॥
The Śaivite Āgama was narrated to Śivā by Śiva out of mercy for those who have resorted to him. That is the sole means of ultimate welfare.
english translation
zrIkaMThena zivenoktaM zivAyai ca zivAgamaH ॥ zivAzritAnAM kAruNyAcchreyasAmekasAdhanam ॥ 39 ॥
hk transliteration by Sanscript