Is any scriptures says that, Without chanting the names of the God, we are all living dead?

Question

How does someone considered as a living dead if not chanting the names of God?

Answer 1

Never to deny spirit(brahman) because the spirit is atman.

Brahman was this before; therefore it knew even the Ātma (soul, himself). I am Brahman, therefore it became all. And whoever among the gods had this enlightenment, also became That. It is the same with the sages, the same with men. Whoever knows the self as “I am Brahman,” becomes all this universe. Even the gods cannot prevail against him, for he becomes their Ātma. Now, if a man worships another god, thinking: “He is one and I am another,” he does not know. He is like an animal to the gods. As many animals serve a man, so does each man serve the gods. Even if one animal is taken away, it causes anguish; how much more so when many are taken away? Therefore it is not pleasing to the gods that men should know this.

— Brihadaranyaka Upanishad 1.4.10

SIXTH ANUVAKA.

He who knows the Brahman as non- existing, becomes himself non-existing. He who knows the Brahman as existing, him we know himself as existing.' The embodied Self of this (bliss) is the same as that of the former (understanding).

—Taittrayi upnishad book 2.6

so, there i think is no restriction of chanting name of god but it is said to read vedas which is itself great.