Yogsutras of Patanjali: Samadhipaad, Yogsutra 2.19
Patanjali details the forms of gunas, Visheshaavisheshalingamaatraalingaani gunaparvaani Dhyaan: dhyan Vishesh: particular, specific Avishesh: generic, non-specific Lingamaatra: intellect or buddhi, mark alone Alingaani: without marks,