Skandapurana 5.263.25

5.263.25

tvaṃ gururmāṃ ca rakṣasva punarnarakamajjanāt..
yena jñātamidaṃ jñānaṃ tvatprasādādakhaṃḍitam..25..

You are my guru; protect me from sinking again into hell! / By your grace this undivided knowledge has been known [by me];