Asceticism is a lifestyle characterized by abstinence from sensual pleasures, often for the purpose of pursuing spiritual goals. Ascetics may withdraw from the world for their practices or continue to be part of their society, but typically adopt a frugal lifestyle, characterised by the renunciation of material possessions and physical pleasures, and also spend time fasting while concentrating on the practice of religion or reflection upon spiritual matters.
Al-Hujwīrī quotes one Abū Husayn Nūrī (d. 294 AH/907 CE), who said, ‘Al-Sufi alladhī lā yamlik wa-lā yumlak’: ‘The Sufi is he that has owns nothing nor is himself owned (possessed) by anything.’ (‘Alī b. ‘Uthmān al-Jullabī al-Hujwīrī, Kashf al-Maḥjūb,trans. Reynold A. Nicholson, Wiltshire: Gibb Memorial Trust, 2000, p.37)
Thank you for your question. This is not a hadith found in Shii scriptural sources, although it is often attributed to our Imams (as).
May you always be successful