sika (Sufism Glossary)

and surrender. (Manāzil, 15)

Transactions; observance, murāqaba (spiritual vigilance), ḥurma (reverence), ikhlas (sincerity), tahdhīb (refinement), uprightness, tawakkul (reliance upon God), tafwīḍ (entrusting one's affairs to God), sika (trustworthiness) and surrender. (Rihla, 206)