Shiva Purana
प्राणायामः प्रत्याहारो धारणा ध्यानमेव च ॥ समाधिरिति योगांगान्यष्टावुक्तानि सूरिभिः ॥ १५ ॥
Pranayama, pratyahara, dharana and meditation are also performed. The sages have described the eight limbs of yoga as samadhi.
english translation
prANAyAmaH pratyAhAro dhAraNA dhyAnameva ca ॥ samAdhiriti yogAMgAnyaSTAvuktAni sUribhiH ॥ 15 ॥
hk transliteration by Sanscript