The response of Orpah and Ruth can be mapped to the types of soil in the gospel parable of the sower
Orpah is the rocky soil, which cannot withstand the heat and dies, for she has no root
Ruth is the good soil, which produces a crop with great yield due to her faith, and it aligns well with the overarching theme of Judges, that Israel needs a king
And the great yield of Ruth’s faith is David, her great-grandson, who is the great king of Israel
And the greatest yield of Ruth’s faith is Christ, further down her genetic line, who is the greatest king of Israel, the king of kings