Laa 'ilaaha 'illallaahu wahdahu laa shareeka lahu, lahul-mulku wa lahul-hamdu wa Huwa 'alaa kulli shay'in Qadeer.
The best invocation is that of the Day of Arafat, and the best that anyone can say is what I and the Prophets before me have said: "None has the right to be worshiped but Allah alone, Who has no partner. His is the dominion and His is the praise, and He is Able to do all things".