The basic creed of Reformed churches, as most familiarly known, is called the Apostles' Creed. It has received this title because of its great antiquity; it dates from very early times in the Church, a half century or so from the last writings of the New Testament.
Martin Luther said "Christian truth could not possibly be put into a shorter and clearer statement" than that which is contained in the Apostles’ Creed. The earliest trace of the Apostles Creed goes back to Ignatius who lived in the late 1st and early 2nd century AD.
The Apostles' Creed
I believe in God, the Father Almighty,
the Creator of heaven and earth,
and in Jesus Christ, His only Son, our Lord:
Who was conceived of the Holy Spirit,
born of the Virgin Mary,
suffered under Pontius Pilate,
was crucified, died, and was buried.
He descended into hell.
The third day He arose again from the dead.
He ascended into heaven
and sits at the right hand of God the Father Almighty,
whence He shall come to judge the living and the dead.
I believe in the Holy Spirit,
the *one holy universal church,
the communion of saints,
the forgiveness of sins,
the resurrection of the body,
and life everlasting.
Amen.