Naomi took the child, placed him on her lap, and became his nurse.
And the neighbor women gave him his name,
at the news that a grandson had been born to Naomi.
They called him Obed.
He was the father of Jesse, the father of David. (Ru 2:1-3,8-11; 4:13-17)

Ruth, the foreigner, gives gives Naomi a grandson, who becomes the grandfather of King David, and thus Ruth becomes one of the many great grandmothers of the Lord. St Pius X, the Pope of the Holy Eucharist,  began the great liturgical reform which bore fruit in the Second Vatican Council much later. His motto: “To Restore All Things in Christ.”