Irenaeus

...to whom Peter, coming in, said, "Of a truth I perceive that God is no respecter of persons: but in every nation, he that feareth Him, and worketh righteousness, is acceptable to Him." He thus clearly indicates, that He whom Cornelius had previously feared as God, of whom he had heard through the law and the prophets, for whose sake also he used to give alms, is, in truth, God. The knowledge of the Son was, however, wanting to him...