After the patriarchs, God formed Israel as his people by freeing them from slavery in Egypt. He established with them the covenant of Mount Sinai and, through Moses, gave them his law so that they would recognize him and serve him as the one living and true God, the provident Father and just judge, and so that they would look for the promised Savior.
Israel is the priestly people of God, “called by the name of the LORD”, and “the first to hear the word of God”, The people of “elder brethren” in the faith of Abraham.
Through the prophets, God forms his people in the hope of salvation, in the expectation of a new and everlasting Covenant intended for all, to be written on their hearts. The prophets proclaim a radical redemption of the People of God, purification from all their infidelities, a salvation which will include all the nations. Above all, the poor and humble of the Lord will bear this hope. Such holy women as Sarah, Rebecca, Rachel, Miriam, Deborah, Hannah, Judith and Esther kept alive the hope of Israel’s salvation. The purest figure among them is Mary.
From the Catechism of the Catholic Church 62-64