Ruth was to prepare herself to approach Boaz.
"Wash thyself therefore, and anoint thee, and put thy raiment upon thee," Ruth 3:3.
Note the 3-fold preparation.
Washing,
Anointing (John 12:3),
Raiment.
This is the three-fold on-going experience of the true child of God.
She was to be as a bride. She came to give herself away.