what are the words used by religion clause in the first amendment
The Establishment clause forbids Congress to enact laws which purpose is "an establishment of religion."
First Amendment to the United States Constitution
The Establishment clause forbids Congress to enact laws which purpose is "an establishment of religion." 
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First Amendment to the United States Constitution [SEP] Establishment of religion
The Establishment clause forbids Congress to enact laws which purpose is "an establishment of religion." The term establishment denoted in general direct aid to the church by the government. The Establishment Clause acts as a double security, for its aim is as well the prevention of religious control over government as the prevention of political control over religion. The First Amendment framers knew that intertwining government with religion could lead to bloodshed or oppression, because this happened too often historically. To prevent this dangerous development they set up the Establishment Clause as a line of demarcation between the functions and operations of the institutions of religion and government in society.