Mahāmudrā, Mahābandha, Mahāvedha, Khecarī, Uḍḍiyāna, Mūlabandha, and the bandha called Jālandhara…

This verse begins the enumeration of the main mudrās. The first seven:

1. Mahāmudrā — The “Great Seal.” Extended leg, heel at perineum, forward bend with bandhas.

2. Mahābandha — The “Great Lock.” The three bandhas simultaneously with crossed leg.

3. Mahāvedha — The “Great Piercing.” Striking the ground with the buttocks in mahābandha to force prāṇa into suṣumnā.

4. Khecarī — “Moving in space.” Tongue turned backward into the nasal cavity.

5. Uḍḍiyāna Bandha — “Flying upward.” Abdominal retraction and diaphragm elevation.

6. Mūla Bandha — “Root lock.” Contraction of the perineum.

7. Jālandhara Bandha — “Net lock.” Chin to chest, throat sealed.

The three bandhas (mūla, uḍḍiyāna, jālandhara) are fundamental and are used in combination with prāṇāyāma and the major mudrās.