TGAs28(1) 22.1.29 :ודוכתא דמצלו בה וליכא ז׳ למיקרא בסיפרא תנו ותלתי‏ : in a place where they are praying, and there are not seven people to read in the Torah scroll, (the same people may read) a second and a third time
See the entire entry for tlt vb. D to do three times