“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.”
Jewish Publication Society of America Version (JPS1917) - Exodus 4:10 >And Moses said unto the LORD: 'Oh Lord, I am not a man of words, neither heretofore, nor since Thou hast spoken unto Thy servant; for I am slow of speech, and of a slow tongue.'