This study explores the theological foundation and implications of surrendering one’s life and wealth to Allah, based on the Islamic concept of bay‘ah (covenant) and ‘ubudiyyah (servitude). Drawing upon the Qur’an and Hadith, the paper establishes that declaring “La ilaha illallah” is not merely a verbal affirmation but a binding contract of spiritual ownership. The article investigates how this sacred pledge transforms personal autonomy, redefines material possession, and mandates ethical accountability. Through textual analysis of primary Islamic sources, the study underscores the vital link between belief, moral responsibility, and eternal reward, arguing that spiritual ownership by Allah must manifest in lived servitude and character integrity.