Shiva Purana

siva.sh/siva-purana/rudra-samhita/14/26

आयुष्कामो भवेद्यो वै दूर्वाभिः पूजनश्चरेत् ।। पुत्रकामो भवेद्यो वै धत्तूरकुसुमैश्चरेत् ।।२६।।

sanskrit

A person desirous of long life shall worship him with Dūrvā grass. A person desirous of sons shall worship him with Dhattūra flowers.

english translation

AyuSkAmo bhavedyo vai dUrvAbhiH pUjanazcaret || putrakAmo bhavedyo vai dhattUrakusumaizcaret ||26||

hk transliteration by Sanscript