Where Do We Go From Here, by Moshe Feiglin (the article soon to be archived here.)
“When the Jewish emissaries who searched for these children throughout Europe would enter the monastery, there was a sure way to identify them. The emissary would stand on a chair and call out, Shema Yisrael… (”Hear O’ Israel…”) and the Jewish children would automatically finish the sentence that had accompanied them from the time that they were born. At that point, it was easy to return them to their own nation and identity.”

