 All hymns in each Veda were recited in this way; for example, all 1,028 hymns with 10,600 verses of the Rigveda was preserved in this way; as were all other Vedas including the Principal Upanishads, as well as the Vedangas.Each text was recited in a number of ways, to ensure that the different methods of recitation acted as a cross check on the other.Pierre-Sylvain Filliozat summarizes this as follows