Bhagavat Gita 7-24: "The ignorant believe that un-manifest Para Brahma (One God) incarnates or takes manifestations, because they do not completely understand My highest, immutable, incomparable, and transcendental existence."
Bhagavat Gita 7:19-21: "All those who do idol worship, All those who worship demigods are materialistic people."
Yajur Veda 3:32: "...Of that God you cannot make any images."
Yajur Veda 32:3: "God is formless and bodiless"
Yajur Veda 40:8: "All those who worship the uncreated things, they are in darkness, and you'll enter more into darkness if you worship the created things."
Rig Veda, Vol.8,1:1: "All Praise are to Him alone"
Rig Veda, Vol.6,45:16: "There is only One God, worship Him."