Charles Spurgeon Commentary Ruth 1:3-4

"And Elimelech, Naomi`s husband, died; and she was left, and her two sons. And they took them wives of the women of Moab; the name of the one was Orpah, and the name of the other Ruth: and they dwelt there about ten years." — Ruth 1:3-4 (ASV)

Which was about ten years too long. Probably they did not intend to remain so long when they went there; they only meant to be in Moab for a little while, just as Christian people, when they fall into worldly conformity, only purpose to do it once, "just for the sake of the girls, to bring them out a little." But it happens to them as it is written here: and they dwelled there about ten years.