Shiva Purana
लिंगभागेष्वधोभागं बीजाख्यं कारणत्रये ॥ चतुःषष्टिगुणैश्वर्यं बौद्धं यदणिमादिषु ॥ १० ॥
The lower part of the sex organ is called the seed for three reasons. The Buddha has sixty-fourfold opulence in the aṇimā and others.
english translation
liMgabhAgeSvadhobhAgaM bIjAkhyaM kAraNatraye ॥ catuHSaSTiguNaizvaryaM bauddhaM yadaNimAdiSu ॥ 10 ॥
hk transliteration by Sanscript