Can the Ecce Agnus Dei be changed?

Is there any leeway for the priest in the words of the “Behold the Lamb of God” prayer?

No. If there is “leeway” then the instruction in the Roman Missal will say, “or similar words.” The Lamb of God does not contain that phrase, therefore it should be said as is.

DISCLAIMER: The views and opinions expressed in these forums do not necessarily reflect those of Catholic Answers. For official apologetics resources please visit