Catechism of the Catholic Church §59 — excerpt
In order to gather together scattered humanity God calls Abram from his country, his kindred and his father's house, and makes him Abraham, that is, "the father of a multitude of nations".
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.