Exceeding fair (asteios tōi theōi). Ethical dative, fair to God (as God looked at him). Asteios is from astu, city, and so means “of the city,” with city manners and polish. Old word, only twice in the N.T. (here and Heb 11:23) and both times about Moses and taken from Exo 2:2.
He was nourished (anetraphē). Second aorist passive indicative of anatrephō. He was brought up at home for three months in defiance of the new Pharaoh.