Shiva Purana
स्थावरांकुरवद्भूमिमुद्भिद्य व्यक्त एव सः । स्वयंभूतं जातमिति स्वयंभूरिति तं विदुः ३३ ।
Just as a plant emerges from the earth, Lord Shiva, breaking through the firmament (the solid earth), manifests himself clearly. He is known as Svayambhu (self-manifested), the one who has been born of himself.
english translation
sthAvarAMkuravadbhUmimudbhidya vyakta eva saH । svayaMbhUtaM jAtamiti svayaMbhUriti taM viduH 33 ।
hk transliteration by Sanscript