Shiva Purana
बीजं द्वितीयं बीजेषु मंत्रस्यास्य वरानने ॥ दीर्घपूर्वं तुरीयस्य पञ्चमं शक्तिमादिशेत् ॥ ४५ ॥
The seed is the second of the seeds of this mantra, O beautiful one. The fifth power of the fourth should be ordered long before.
english translation
bIjaM dvitIyaM bIjeSu maMtrasyAsya varAnane ॥ dIrghapUrvaM turIyasya paJcamaM zaktimAdizet ॥ 45 ॥
hk transliteration by Sanscript