Buddhist milieu. The inscription at the end of one Amṛtasiddhi manuscript ascribes the text to Mādhavacandra or Avadhūtacandra and is "said to represent the teachings of Virūpākṣa". According to Mallison, this figure is most likely the Buddhist mahasiddha Virupa. Early Hindu texts The c. 10th century Kubjikāmatatantra anticipates haṭha yoga with its description of the raising of Kundalini, and a 6-chakra system. Around the 11th century, techniques associated with Haṭha yoga also begin to be outlined in a series of early Hindu texts. The aims of these practices were siddhis (supranormal powers such as levitation) and mukti (liberation). In India, haṭha yoga is associated in popular tradition with the Yogis of the Natha Sampradaya. Almost all hathayogic texts belong to the Nath siddhas, and the important ones are credited to Gorakhnath or Gorakshanath (c. early 11th century), the founder of the Nath Hindu monastic movement in India, though those texts post-date him. Goraknath is regarded by the contemporary Nath-tradition as the disciple of Matsyendranath (early 10th century), who is celebrated as a saint in both Hindu and Buddhist tantric and haṭha yoga schools, and regarded by tradition as the founder of the Natha Sampradaya. Early haṭha yoga works include: The Amaraughaprabodha (12th century, attributed to Goraknath) describes three bandhas to lock the vital energy into the body, as in the Amṛtasiddhi, but also adds the raising of Kundalinī. The Dattātreyayogaśāstra, a Vaisnava text probably composed in the 13th century CE, is the earliest text which provides a systematized form of Haṭha yoga, and the earliest to place its yoga techniques under the name Haṭha. It teaches an eightfold yoga identical with Patañjali's 8 limbs that it attributes to Yajnavalkya and others as well as eight mudras that it says were undertaken by the rishi Kapila and other ṛishis. The Dattātreyayogaśāstra teaches mahāmudrā, mahābandha, khecarīmudrā, jālandharabandha, uḍḍiyāṇabandha, mūlabandha, viparītakaraṇī, vajrolī, amarolī, and sahajolī. The Vivekamārtaṇḍa, an early Nāth text (13th century) attributed to Goraknath, contemporaneous with the Dattātreyayogaśāstra, teaches nabhomudrā (i.e. khecarīmudrā), mahāmudrā, viparītakaraṇī and the three bandhas. It also teaches six chakras and the raising of Kundalinī by means of "fire yoga" (vahniyogena). The Gorakṣaśataka, a Nāth text of the same period (13th century), teaches śakticālanīmudrā ("stimulating Sarasvatī") along with the three bandhas. "Stimulating Sarasvat" is done by wrapping the tongue in a cloth and pulling on it, stimulating the goddess Kundalinī who is said to dwell at the other