Exodus 6:9-12

9Moses told this to the Israelites, but they did not listen to him because of their impatience and despondency, and because of their forced labor.

10The Lord spoke to Moses, saying,

11“Go, tell Pharaoh king of Egypt to let the children of Israel go out of his land.”

12But Moses said to the Lord, “Look, [my own people] the Israelites have not listened to me; so how then will Pharaoh listen to me, for I am unskilled and inept in speech?”