Śrīmad-Bhāgavatam · Text 8.12.33
Who is speaking and story frame
यत्र यत्रापतन्मह्यां रेतस्तस्य महात्मन: । तानि रूप्यस्य हेम्नश्च क्षेत्राण्यासन्महीपते ॥ ३३ ॥
yatra yatrāpatan mahyāṁ
retas tasya mahātmanaḥ
tāni rūpyasya hemnaś ca
kṣetrāṇy āsan mahī-pate
O King, wheresoever on the surface of the globe fell the semen of the great personality of Lord Śiva, mines of gold and silver later appeared.
Read Śrīla Prabhupāda's purport on Vedabase.io