Shiva Purana
तद्वीर्यं स्थापयामासुः पत्रे सप्तर्षयश्च ते ॥ प्रेरिता मनसा तेन रामकार्यार्थमादरात ॥ ५॥
Eagerly urged by him mentally for Rāma’s work, the seven celestial sages retained that semen in a leaf.
english translation
tadvIryaM sthApayAmAsuH patre saptarSayazca te ॥ preritA manasA tena rAmakAryArthamAdarAta ॥ 5॥
hk transliteration by Sanscript