I have listened to 100+ hours of testimonies by Holocaust survivors. Those who were in concentration, labor, or death camps invariably described the brutal roll calls known in German as Appels.
However, a handful of survivors used a two-word phrase that sounded to me like "'sale Appel," which makes no sense. The witnesses did not define the phrase, and the interviewers did not ask for clarification.
What is the phrase in question?