Catechism of the Catholic Church §1611 — excerpt
Seeing God's covenant with Israel in the image of exclusive and faithful married love, the prophets prepared the Chosen People's conscience for a deepened understanding of the unity and indissolubility of marriage.
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.
Whole chapters cited: Hosea 1 · Hosea 2 · Hosea 3 · Isaiah 54 · Isaiah 62 · Jeremiah 2 · Jeremiah 3 · Jeremiah 31 · Ezekiel 16 · Ezekiel 23