Exodus 11:7

11:7 But against any of the Israelites not even a dog will bark against either people or animals, so that you may know that the Lord distinguishes between Egypt and Israel.’

Exodus 33:16

33:16 For how will it be known then that I have found favor in your sight, I and your people? Is it not by your going with us, so that we will be distinguished, I and your people, from all the people who are on the face of the earth?”