In the wake of the #MeToo movement, the Roman Catholic Church is being forced to confront evidence that clergy have sexually abused nuns.
His three-day trip was intended to promote religious fraternity and diversity, at a time when long-established Christian communities in the Middle East are dwindling.
The pope, an outspoken advocate for refugees and migrants, urged the international community to set aside its differences and turn its attention to crises around the world.
Priests who sexually abuse children are like Judas Iscariot, the disciple who betrayed Jesus Christ, Pope Francis told a gathering of cardinals on Friday.
"At the insistence of the Holy See, we will not be voting" on a standard of conduct and other actions, said Cardinal Daniel DiNardo, president of the U.S. Conference of Catholic Bishops.
The two high-ranking retired clerics, Archbishop Francisco José Cox Huneeus and Bishop Marco Antonio Órdenes Fernández, were expelled from the priesthood because of alleged "manifest abuse of minors."
Two months ago, a Pennsylvania grand jury detailed how Wuerl learned of credible abuse allegations against priests under his supervision — and still gave the men new parish assignments.
Six of 10 U.S. Catholics say Pope Francis is doing only a "fair" or even a "poor" job handling the clergy abuse crisis. He is now only as popular as his predecessor, Pope Benedict.