Shiva Purana
अष्टावघोररूपिण्यो मकारे संस्थिताः कलाः ॥ बिन्दौ चतस्रस्संभूताः कलाः पुरुषगोचराः ॥ २८ ॥
The eight Kalās of the form of Aghora are stationed in ‘M’. In Bindu four Kalās of the form of Puruṣa exist.
english translation
aSTAvaghorarUpiNyo makAre saMsthitAH kalAH ॥ bindau catasrassaMbhUtAH kalAH puruSagocarAH ॥ 28 ॥
hk transliteration by Sanscript