Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/31/34

ततस्संतुष्टहृदयो रामभक्त्या महेश्वरः ।। शिवमस्तु वरं ब्रूहि रामेति स तदाब्रवीत् ।। ३४ ।।

sanskrit

Then, satisfied in his heart with Rāma’s devotion lord Śiva said—“O Rāma, may there be welfare to you. Mention the boon you wish to have.”

english translation

tatassaMtuSTahRdayo rAmabhaktyA mahezvaraH || zivamastu varaM brUhi rAmeti sa tadAbravIt || 34 ||

hk transliteration by Sanscript