Exodus 33:16-17

For how then can it be known that I have found favor in Your sight, I and Your people? Is it not by Your going with us, so that we, I and Your people, may be distinguished from all the other people who are upon the face of the earth?” The LORD said to Moses, “I will also do this thing of which you have spoken; for you have found favor in My sight and I have known you by name.”