Rorate Caeli

"It is said"

From a news dispatch (October 21) of the French Episcopal Conference (CEF):

As for the eventual Motu Proprio, "its text is written" and it is "being re-read" by different Vatican congregations, because it elicits opposition, even amidst the Congregation for Divine Worship and the Discipline of the Sacraments. "It is necessary to let [things] mature, not to precipitate" things, it is said in Rome.
"It is said" whom? They do not say.