Where did "for thine is the kingdom..." come from?

[helenmariethere]

Hi, I’m new at this. Here is my question.

Where did the word’s, “for thine is the kingdom, power and glory forever,” originate?

When and why where they added to the Mass?

 

[Reginald_Plum]

HMT,

These links should be helpful for understanding the history of the Final Doxology. If you have any further questions or concerns that are not answered by these links, please contact Catholic Answers directly.

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