What amendment does it talk about religion in the Constitution?

The short answer is neither God nor Jesus are mentioned in the U.S. Constitution. Nor are they mentioned in the Bill of Rights.

Curiously Article VI Section (3) of the U.S. Constitution is the only reference to religion in the original Constitution and it says "The Senators and Representatives before mentioned, and the Members of the several State Legislatures, and all executive and judicial Officers, both of the United States and of the several States, shall be bound by Oath or Affirmation, to support this Constitution: but no religious test shall ever be required as a Qualification to any Office or Public Trust under the United States

Despite being mostly Christian, our Founding Fathers and the government they created specifically avoided and banned the idea that our nation is identified by Christianity. The Word "God" on many of our historic buildings in DC reflect at most that our Founding Fathers wanted to recognize a general sense of God- if their intent was to promote this nation specifically as a tolerant Christian nation, "Christ" or "Jesus" should appear in at least some of our documents or buildings. (Since Jesus Christ is the central character of Christianity that sets it apart from other godly religions.)

The Founding Fathers, the nation at the time, and the nation now is one that has a majority of Christians. It is quite another thing (and erroneous) to say that it is a Christian nation.

Interestingly enough but not surprisingly, there have been attempts to add God and Jesus to the US Constitution. Christian attempts to amend the US Constitution occurred in 1864, 1874, 1896 and 1911.

The original version of these amendments stated "We, the people of the United States recognizing the being and attributes of Almighty God, the Divine Authority of the Holy Scriptures, the law of God as the paramount rule, and Jesus, the Messiah, the Savior and Lord of all, in order to form a more perfect union, establish justice, insure domestic tranquillity, provide for the common defence, promote the general welfare, and secure the blessings of liberty to ourselves and to our posterity, do ordain and establish this Constitution for the United States of America.

Wisely Congress never passed this or similar amendments. But that doesn't mean God didn't creep in in other ways. For example, there is our current national motto which is printed on our money. "In God We Trust"1.

BIBLIOGRAPHY

Zenke, S. (2006, July 8). God is Not in the U.S. Constitution or Bill of Rights. Retrieved September 10, 2010, from Majority Rules Blog: http://www.majorityrules.org/2006/07/god-is-not-in-us-constitution-or-bill.html

FOOTNOTES

1. "In God We Trust"1 is the national motto of the United States of America. It was so designated by an act of Congress in 1956 and officially supersedes "E Pluribus Unum" (Out of Many, One) according to United States Code, Title 36, Section 302. President Eisenhower signed the resolution into law on 30 July 1956.