30 Moses said in the presence of the LORD, “Look, I’m not a persuasive speaker, so how will Pharaoh listen to me?”
Exodus 6:30 Cross References - ISV
Exodus 4:10
10 Then Moses told the LORD, “Please, LORD, I’m not eloquent. I never was in the past nor am I now since you spoke to your servant. In fact, I talk too slowly and I have a speech impediment.”
Exodus 6:12
12 Then Moses said right in front of the LORD, “Look, the Israelis didn’t listen to me, so how will Pharaoh? I’m not a persuasive speaker”