Ba'al Shem Tov, Kuntres Meirat Einayim 28/בעל שם טוב על התורה·קונטרס מאירת עינים כ״ח

1The cantor also told R. Elimelech how every Friday afternoon, during the mincha prayer, tens of thousands of souls would gather around the Baal Shem Tov, and he would fix them and raise them all to their source.