For more than 70 years, the composer of the prayer was thought to be the Protestant theologian Reinhold Niebuhr. It is not a prayer as such from the bible.
Keep my commandsAnswer:"He hath shewed thee, O man, what is good; and what doth the Lord require of thee, but to do justly, and to love mercy, and to walk humbly with thy God." (Micah 6:8)
There is one verse in the New Testament:-
Luk 1:28 ISV The angel came to her and said, "Greetings, you who are highly favored! The Lord is with you!"
In the Old Testament this phrase "the Lord is...