Shiva Purana
मकारः पुरुषो बीजी तमस्संहारको हरः ॥ बिन्दुर्महेश्वरो देवस्तिरो भाव उदाहृतः ॥ २२॥
‘M’ is the Puruṣa, the Bījin, Tamas, the annihilator Śiva. Bindu is Maheśvara the lord, the disappearance.
english translation
makAraH puruSo bIjI tamassaMhArako haraH ॥ bindurmahezvaro devastiro bhAva udAhRtaH ॥ 22॥
hk transliteration by Sanscript