Adi Shankaracharaya
Thou art residing in secrecy with Thy Lord (the spirit)
in the thousand petalled Lotus, having pierced through
the Earth situated at Mooladhara,
the water in the Manipura,
the Fire abiding in the Swadhishtana,
the Air in the Heart (Anahata)
the Ether above (Vishuddha)
and Manas between eyebrows (Agyna)
and thus broken the entire kula path
Adi Shankaracharya, 6th century
Saundarya Lahiri, Page 50
All the great self-realized souls and scriptures have spoken about kundalini and/or self-realization. For example: