Heidelberg Q71

Where has Christ promised us, that he will as certainly wash us by his blood and Spirit, as we are washed with the water of baptism? In the institution of baptism, which is thus expressed: Go ye, therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost. He that believeth, and is baptized, shall be saved; but he that believeth not, shall be damned.