Qur'anic verses - Unity of mankind:

The unity of mankind is based on the belief in the Oneness of God, the Creator of all human beings. He is the Lord over all human beings. Thus, the Muslim believes in the unity of mankind whereby the original parentage is that of Adam and Eve. The implication of this is that God does not confine His religion to any particular nation, race, or sex.
Mankind was one single nation.
[Qur'an 2:213]