Shemot 33:16-17

For how then shall it be known that I and Thy people have found chen in Thy sight? Is it not in that Thou goest with us? So shall we be made distinct as separate, I and Thy people, from all the people that are upon the face of ha'adamah. And HASHEM said unto Moshe, I will do this thing also that thou hast spoken; for thou hast found chen in My sight, and I know thee by shem.