إِيَّاكَ نَعْبُدُ
You alone we worship.
Iyyāka is the fronted object of naʿbudu. In ordinary Arabic order, the object may follow the verb; here fronting conveys restriction and exclusivity in context.
Do not treat all fronting as automatic restriction. It can also create anticipation, prominence, reinforcement, or rhythmic balance. Identify what is fronted and what the surrounding discourse makes it accomplish.