Ek Oankar Wahiguru Ji Ki Fateh Das is only interested only to know do tradition in Gurmat,Which are not wriitten any where but followed till today since the time of Gurus. Das could give only an example may be it is wrong. Das thinks that when we sing, 'Tu Thakur Tum Pai Ardas..' Before doing Ardas. This is written no where in the books but followed since the times of Gurus. Das is only intersted that do we have such more tradtions which are part of our day to day ceromanies of Gurumat but not wriitten in any old book.