Shiva Purana

siva.sh/siva-purana/uma-samhita/18/20

अवाप्य मानुष्यमयं कदाचिद्विहृत्य शंभोः परमात्मरूपे ।। फलानि सर्वाणि तु कर्मजानि यास्याम्यहं तत्तनुतां हि तस्य।। २०।।

sanskrit

After getting human birth once in a way, and sporting about in the great soul form of Śiva I shall attain the fruits of all sacred rites in that form.

english translation

avApya mAnuSyamayaM kadAcidvihRtya zaMbhoH paramAtmarUpe || phalAni sarvANi tu karmajAni yAsyAmyahaM tattanutAM hi tasya|| 20||

hk transliteration by Sanscript