Hazrat Ali (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: The supplication most frequently made by me and all the prophets before me at the place of Arafah is this: There is no deity except Allah, He is alone, He has no partner, His is the dominion and to Him belongs all praise, and He has power over all things. O Allah! Place light in my heart, and place light in my ears, and place light in my eyes. O Allah! Open my chest for me, and make my affair easy for me, and I seek refuge in You from the whispers of Satan, from the corruption of my affairs, and from the trial of the grave. O Allah! I seek refuge in You from the evil of everything that enters the night and from the evil of everything that enters the day, and from the evil of that which the winds bring.

Hazrat Ibn Abi Husain narrates that the Messenger of Allah, peace and blessings be upon him, said: The supplication I have made most abundantly at the place of Arafah, and the supplication of the prophets before me, is this: There is no deity except Allah, He is alone, He has no partner, His is the dominion and His is the praise, He gives life and He gives death, and He has power over all things.

Hazrat Abu Sha'bah says that I was in the plain of Arafat beside Hazrat Ibn Umar (may Allah be pleased with them). And my knee was touching his knee, or my thigh was touching his thigh. So I did not hear that he added anything to these words: There is no deity except Allah, He is alone, He has no partner, His is the dominion and for Him is all praise, and He is powerful over everything. Until he returned from the plain of Arafat to Mina.

Hazrat Abdur Rahman bin Bishr narrates that I asked Ibn Hanfiyyah: What are the best words that we should recite during our Hajj? He replied: There is no deity except Allah, and Allah is the Greatest.

With this mentioned chain of narration as well, the statement of Hazrat Ibn Hanafiyyah similar to the previous one has been narrated.

Hazrat Dawood bin Abi Asim narrates that I stood with Hazrat Salim bin Abdullah in the plain of Arafat. I kept observing what he was doing. He remained engaged in remembrance (dhikr) and supplication (dua) until he returned to Mina.