Exodus 6:30

Moses said in the presence of the LORD, "Look, I'm not a persuasive speaker, so how will Pharaoh listen to me?"

Exodus 6:12

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."

Exodus 4:10

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."

1 Corinthians 9:16-17

For if I preach the gospel, I have nothing to boast about, for this obligation has been entrusted to me. How terrible it would be for me if I didn't preach the gospel!

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