Shiva Purana

siva.sh/siva-purana/rudra-samhita/10/25

इत्थं रूपं त्वया तावद्रक्षणीयं ममाज्ञया ।। तावत्सृष्टेश्च कार्यं वै कर्तव्यं विविधैर्गुणैः ।।२५।।

sanskrit

It is my directive that you should preserve this form and maintain all the activities of the created worlds by means of these different Guṇas so long.

english translation

itthaM rUpaM tvayA tAvadrakSaNIyaM mamAjJayA || tAvatsRSTezca kAryaM vai kartavyaM vividhairguNaiH ||25||

hk transliteration by Sanscript