Shiva Purana
त्र्यंबकाख्योऽवतारो यः सोष्टमो गौतमीतटे ॥ प्रार्थितो गौतमेनाविर्बभूव शशिमौलिनः ॥ ३४॥
The eighth incarnation Tryambaka of the moon-crested lord Śiva made its appearance on the banks of the river Gautamī on being requested by the sage Gautama.
english translation
tryaMbakAkhyo'vatAro yaH soSTamo gautamItaTe ॥ prArthito gautamenAvirbabhUva zazimaulinaH ॥ 34॥
hk transliteration by Sanscript