Ten years

Noami sojourned in the fields of Moab for 10 years (Ruth 1:4), which points to the conclusion of the book, where the author traces the descend of Judah for 10 generations, to David. After 10 years, Naomi returned to the land, which by then had become fruitful (1:22). After 10 years, Boaz took the place of Elimelech as the head of Naomi’s remnant family. After 10 generations, Judah returned to the congregation of Israel (cf. Deuteronomy 23) as the royal tribe, and the land flourished.