Patanjali Yog Sutra
शौचसंतोषतपःस्वाध्यायेश्वरप्रणिधानानि नियमाः॥२-३२॥
Cleanliness, Contentment, Austerity (Mental and physical discipline), Svadhyaya (Study of scriptures and chanting of Mantras) And Devotion to God are the Niyamas (Observance).
english translation
बाह्य एवं अंत:स्वच्छता, संतुष्टि, तप ,स्वाध्याय और ईश्वर-शरणागति - ये पाँच नियम हैं।
hindi translation
zaucasaMtoSatapaHsvAdhyAyezvarapraNidhAnAni niyamAH॥2-32॥
hk transliteration by Sanscript