Ekam evadvitiyam"
"He is One only without a second."
[Chandogya Upanishad 6:2:1]1

2. "Na casya kascij janita na cadhipah."
"Of Him there are neither parents nor lord."
[Svetasvatara Upanishad 6:9]2

3. "Na tasya pratima asti"
"There is no likeness of Him."
[Svetasvatara Upanishad 4:19]3