Mother's house — Because daughters used to converse more frequently with their mothers, and to dwell in the same apartments with them, which then were distinct from those parts of the house where the men dwelt. The dead — With my sons, your husbands, while they lived.
Related Commentaries of Ruth 1:8
Ruth 1:8
8 And Naomi said unto her two daughters in law, Go, return each to her mother's house: the LORD deal kindly with you, as ye have dealt with the dead, and with me.