9 Moses reported this to the Israelites, but they did not listen to him because of their discouragement and harsh labor.

Read Exodus 6:9 Using Other Translations

And Moses spake so unto the children of Israel: but they hearkened not unto Moses for anguish of spirit, and for cruel bondage.
Moses spoke thus to the people of Israel, but they did not listen to Moses, because of their broken spirit and harsh slavery.
So Moses told the people of Israel what the LORD had said, but they refused to listen anymore. They had become too discouraged by the brutality of their slavery.