“As faith leaders from the only country that has ever used nuclear weapons in war, we have a particular responsibility to speak boldly when opportunities arise that lead to nuclear disarmament and non-proliferation at home and around the world,” the 51 faith leaders write in a letter, Politico reported on Monday.

“This historic accord moves us one small step closer to a world free of nuclear weapons,” they added.

The letter, which will be sent to lawmakers Tuesday, goes on, “This is a moment to remember the wisdom of Jesus who proclaimed from the Sermon on the Mount, ‘Blessed are the peacemakers, for they shall be called children of God’ (Matthew 5:9)… There is no question we are all better off with this deal than without it.”

Signatories include Adam Estle, executive director of Evangelicals for Middle East Understanding; Archbishop Vicken Aykazian, legate with the Armenian Orthodox Church; and the Rev. Paula Clayton Dempsey of the Alliance of Baptists. Joel C. Hunter, a spiritual adviser to President Barack Obama and senior pastor with Northland, A Church Distributed, also signed, as did Sister Simone Campbell, who has led the “Nuns on the Bus” campaigns for social justice.

Iran and the Group 5+1 (Russia, China, the US, Britain, France and Germany) finalized the text of lasting deal on Tehran’s nuclear program on July 14.

While the United Nations Security Council has adopted a resolution to endorse the deal, the text of the document needs to be ratified by both Iran's Parliament and the US Congress.

US President Barack Obama has promised a swift veto in the event of a Congress rejection of the agreement in September. Lawmakers would then have to find enough votes to override the president.