Shiva Purana

siva.sh/siva-purana/rudra-samhita/98/39

त्वञ्च नष्टो भवसि चेत्सृष्टिनाशो भवेत्तदा।। इति कर्तव्यतामूढा वृथापि च वदाम्यहम् ।।३९।।

sanskrit

If you are destroyed, the annihilation of all creations will occur. But a sense of helpless despair is unnecessary. So I shall explain.

english translation

tvaJca naSTo bhavasi cetsRSTinAzo bhavettadA|| iti kartavyatAmUDhA vRthApi ca vadAmyaham ||39||

hk transliteration by Sanscript