Shaqiq al-Balkhi (d. 810 / AH 194) was an early Sufi saint of the Khorasan school. Tradition makes him the disciple of Ibrahim ibn Adham. He emphazised the importance of tawakkul or reliance upon God.
References
"Tawakkul" in: Oliver Leaman (ed.) The Qur'an: an encyclopedia, Routledge, 2008, ISBN 9781134339754