What are the manifestations of worship upon the heart, tongue, and limbs?

Among the manifestations of the heart's worship are certainty, sincerity, love, fear, hope, and gratitude to Allah. Among the manifestations of the tongue's worship are frequent remembrance of Allah, recitation of the Quran, affirmation of monotheism, seeking beneficial knowledge, enjoining good, and forbidding evil. As for the worship of the limbs, it is through their submission to commands, fulfilling them, and refraining from prohibitions.