Pope John Paul II this week spoke out against further changes in the Roman Catholic liturgy.

In a letter to a clerical group examining worship forms, the pontiff said that the liturgy "has no need for novelty . . . nor does it go constantly in search of 'adaptations' that are not requested nor desired by the Christian people."

He said Catholics need "something certain, solid, durable, to use against the instability of the ephemeral," not only in substance, "but in the form in which the substance is protected and conserved."

Last year the pontiff startled Catholics throughout the world by expanding the circumstances under which the old-style mass, in Latin and using the old order that had been superseded by actions of Vatican II, could be used.

The American Embassy in Mexico City has confirmed that 13 American evangelical preachers and six of their children have been expelled from Mexico for allegedly violating the country's laws governing the exercise of religion.

In a dispatch from Tuxpan, a town 180 miles northeast of the Mexican capital, the national newspaper Excelsior reported Wednesday that the group was expelled by the federal government at the request of authorities in Veracruz.

By law, only Mexican-born citizens can preach a religion in the country or exercise any form of priesthood.

An undisclosed number of Catholic nuns threatened with church discipline by the Vatican for signing a controversial advertisement about abortion last year have made peace with the church, according to a spokesman for American bishops.

Russell Shaw, secretary for public affairs of the National Conference of Catholic Bishops, said that "settlement has been reached" in the cases of "several" of the 24 nuns who had been threatened with possible expulsion from their orders if they failed to recant.

The nuns were among 97 Catholic men and women who signed an advertisement last year that held that Catholicism had historically had a "plurality" of views on abortion and calling for dialogue.

Religious News Service reported that Sister Mary J. Byles, one of the 24, had said she was back in good standing although she had not formally recanted.

Polish Cardinal Jozef Glemp will celebrate the noon mass at St. Matthew's Cathedral and will recite the Rosary in the chapel of Our Lady of Czestochowa at the National Shrine of the Immaculate Conception during his visit here on Sept. 20.

Rabbi Joshua Haberman has announced he will retire next June as spiritual leader of Washington Hebrew Congregation after 16 years in the post.

Bishop James W. Malone, president of the National Conference of Catholic Bishops, has asked Archbishop John L. May, conference vice president, to accompany him to the extraordinary Synod of Bishops at the Vatican, Nov. 25 to Dec. 8.

Others who will assist Malone at the meeting to evaluate the accomplishments made by the Second Vatican Council are Msgr. Daniel F. Hoye, the Rev. Bryan Hehir, the Rev. Carl J. Peter and Russell Shaw.

The Rev. Paul Leslie Brown, who has been pastor of churches in Illinois, Mississippi, Louisiana and Arkansas, is the new pastor of First Baptist Church of Woodbridge.

Shiloh Baptist Church is honoring the Rev. Ronald K. Austin, minister of community services and family life, and also a chaplain in the U.S. Naval Reserves, at a special appreciation day tomorrow at 4 p.m.