Exactly when the custom of wearing phylacteries was introduced is unknown, but most scholars date it to the third or the second century B.C.E.
(‏ تثنية ٦ :‏ ​ ٦ -‏ ٨‏ )‏ اما متى درجت عادة لبس العصائب ،‏ فغير معروف بالضبط .‏