Exodus 4:10

4:10 Then Moses said to the Lord, “O my Lord, I am not an eloquent man, neither in the past nor since you have spoken to your servant, for I am slow of speech and slow of tongue.”

Exodus 28:3

28:3 You are to speak to all who are specially skilled, whom I have filled with the spirit of wisdom, so that they may make Aaron’s garments to set him apart to minister as my priest.