Pronunciation: La i-laha 'il-lal-lahu wah-dahu la shari-ka lahu, lahul-mul-ku wa lahul-ham-du, wa Huwa ala kul-li shay'in Qadir
Meaning: There is no god but Allah alone Who has no partner, to whom dominion belongs, to whom praise is due, and who has power over everything.
Virtue: Say this very often: The Prophet Muhammad, peace be upon him, said: "The most excellent dua is the dua on the Day of Arafah, and the best of what I and the prophets before me have said, is "There is nothing that deserves to be worshiped in truth except Allaah, He is Alone and has no partner, to Him belongs the dominion and to Him belongs all praise, and He is All-Powerful over all things.'"
Reference: Tirmidhi #3585