Shiva Purana
स एव शंकरो देवस्स्वेच्छया च स्वमायया ॥ संकुचद्रूप इव सन्पुरुषस्संबभूव ह ॥ ५ ॥
That lord Śiva himself, out of his own will, through his own Māyā appears shrinking in size and becomes Puruṣa.
english translation
sa eva zaMkaro devassvecchayA ca svamAyayA ॥ saMkucadrUpa iva sanpuruSassaMbabhUva ha ॥ 5 ॥
hk transliteration by Sanscript