All Glories to Srila Prabhupada !
Dear Devotees. We have four primary Vedas : Arthveda, Yujurveda, Samveda, Rigveda, Most of the Aryasamaji will criticize deity worship by quoting from above vedas. As Bhgavad Gita and Bhagvad Puran is the summery of all Vedas it is impossible that above four Vedas have not discuss the process of devotion through 'Saakar Marg" or Deity worship. If anyone has some reference from above four Vedas regarding Deity worship please let me know through this form