Yoga Sutra 3.44 samyama on their physical form
Sūtra III.44 From saṃyama on their physical form, essential nature, subtle form, inherence, and purposefulness: conquest of the elements Here, the earths, having as particulars sound, etc., together with attributes like shape, etc., are defined as physical (sthūla). Each one of the elements (bhūta) is five-fold: physical, essential, subtle, inherent, and with-a-purpose. Here, the earths…