30 But in the LORD’s presence Moses replied, “Since I am unskilled in speech, why would Pharaoh listen to me?”
Exodus 6:30 Cross References - MSB
Exodus 4:10
10 “Please, Lord,” Moses replied, “I have never been eloquent, neither in the past nor since You have spoken to Your servant, for I am slow of speech and tongue.”
Exodus 6:12
12 But in the LORD’s presence Moses replied, “If the Israelites will not listen to me, then why would Pharaoh listen to me, since I am unskilled in speech?”