What is the Prophet Muhammad (peace be upon him) telling us about the Day of Judgement when the people will be asked which God they worshipped?
 Narrated Abu Sa`id Al-Khudri:                     During the lifetime of the Prophet some people said, : O Allah's Apostle! Shall we see our Lord on the Day of Resurrection?" The Prophet said, "Yes; do you have any difficulty in seeing the sun at midday when it is bright and there is no cloud in the sky?" They replied, "No." He said, "Do you have any difficulty in seeing the moon on a full moon night when it is bright and there is no cloud in the sky?" They replied, "No." The Prophet said, "(Similarly) you will have no difficulty in seeing Allah on the Day of Resurrection as you have no difficulty in seeing either of them. On the Day of Resurrection, a call-maker will announce, "Let every nation follow that which they used to worship." Then none of those who used to worship anything other than Allah like idols and other deities but will fall in Hell (Fire), till there will remain none but those who used to worship Allah, both those who were obedient (i.e. good) and those who were disobedient (i.e. bad) and the remaining party of the people of the Scripture. Then the Jews will be called upon and it will be said to them, 'Who do you use to worship?' They will say, 'We used to worship Ezra, the son of Allah.' It will be said to them, 'You are liars, for Allah has never taken anyone as a wife or a son. What do you want now?' They will say, 'O our Lord! We are thirsty, so give us something to drink.' They will be directed and addressed thus, 'Will you drink,' whereupon they will be gathered unto Hell (Fire) which will look like a mirage whose different sides will be destroying each other. Then they will fall into the Fire. Afterwards the Christians will be called upon and it will be said to them, 'Who do you use to worship?' They will say, 'We used to worship Jesus, the son of Allah.' It will be said to them, 'You are liars, for Allah has never taken anyone as a wife or a son,' Then it will be said to them, 'What do you want?' They will say what the former people have said. Then, when there remain (in the gathering) none but those who used to worship Allah (Alone, the real Lord of the Worlds) whether they were obedient or disobedient. Then (Allah) the Lord of the worlds will come to them in a shape nearest to the picture they had in their minds about Him. It will be said, 'What are you waiting for?' Every nation have followed what they used to worship.' They will reply, 'We left the people in the world when we were in great need of them and we did not take them as friends. Now we are waiting for our Lord Whom we used to worship.' Allah will say, 'I am your Lord.' They will say twice or thrice, 'We do not worship any besides Allah.' "