Tag Chandogya Upanishad

No Sandhyavandan Procedure In The Vedas ?

I replied that, to the best o my knowledge that the procedure for Sraddha is laid down in the Smritis and that I do not ind a reference to it in the Veda.

While making this comment I made a remark that I was not sure whether Sandyavandana procedure was mentioned in the Vedas.

I received a feedback that Vedas and Upanishad do mention Sandhyavandana.

I have been able to locate the reference, which I reproduce......

Even this does not constitute a procedure for performing Sandhyavandana.

I am yet to check the Aranyakas.

References to worship of the Sun is mentioned, no procedures to be followed are set.

Inputs clarifications welcome