Though absent from the ESV, the final words of the verse are, Go to your tent.
This term has a literary significance in the context. The Levite's tent
serves as a contrast to the host's house
in Judges 19:2–3. With this word, the girl’s father makes one last appeal to the Levite to remain. For when he gets back to his tent
in the remote parts of Ephraim (Judges 19:1), he will not have the same quality of accommodation and cuisine that he has had over the past five day.1
9 And when the man and his concubine and his servant rose up to depart, his father-in-law, the girl’s father, said to him, “Behold, now the day has waned toward evening. Please, spend the night. Behold, the day draws to its close. Lodge here and let your heart be merry, and tomorrow you shall arise early in the morning for your journey, and go home.”