Rough, cold and hot, tender and clear, hard, oily, smooth, slippery, painful and soft, of twelve kinds is touch, which is the quality of wind, as said by Brahmanas crowned with success, knowing duties, and possessed of a sight of truth.
रूक्षः शीतस्तथैवोष्णः स्निग्धो विशद एव च।॥ कठिनश्चिक्कण: श्लक्ष्णः पिच्छिलो दारुणो मृदुः। एवं द्वादशविस्तारो वायव्यो गुण उच्यते॥ विधिवद् ब्राह्मणैः सिद्धधर्मस्तित्त्वदर्शिभिः॥