Exodus 19:5

Now, therefore, if ye will obey my voice in deed and keep my covenant, gladly enter into the relation of mercy which the Lord intended to propose, then ye shall be a peculiar treasure unto me above all people, a possession to be cherished and guarded most carefully, more than any other nation in the world; for all the earth is Mine, and the sovereign Lord of the universe, who is not a national god, has the right to manifest Himself to a single nation with unusual mercy.