Jabala Darshana 1.1
यमश्च नियमश्चैव आसनं प्राणसंयमः । प्रत्याहारो धारणा च ध्यानं समाधिरेव च
Yamaś ca niyamaś caiva āsanaṁ prāṇa-saṁyamaḥ, pratyāhāro dhāraṇā ca dhyānaṁ samādhir eva ca
Yama, niyama, asana, breath-control, withdrawal, concentration, meditation and absorption — these are the eight limbs of yoga.