Exodus 4:10; Exodus 11:7

Exodus 4:10

10 Then Moses said to the LORD , "Please, Lord , I have never been eloquent , neither recently nor in time past, nor since You have spoken to Your servant; for I am slow of speech and slow of tongue."

Exodus 11:7

7 'But against any of the sons of Israel a dog will not even bark , whether against man or beast, that you may understand how the LORD makes a distinction between Egypt and Israel.'