Ruth 4:15

And may he be to thee a restorer of life, and for the support of thine old age: for thy daughter-in-law, who loved thee, hath borne him, and she is better to thee than seven sons. The number seven suggested an idea of fullness, completeness, perfection. The whole inhabitants of the city knew that Ruth's love to her mother-in-law had been indeed transcendent, and also that it had been transcendently returned.