Yoga Sutras of Patanjali 3.33

मूर्धज्योतिषि सिद्धदर्शनम् ॥

murdha-jyotishi siddha-darshanam

By samyama on the light at the crown of the head, vision of the perfected ones arises.

मूर्ध-ज्योति पर (संयम से) सिद्ध-दर्शन।