2 Boaz is a close relative of ours, and he's been very kind by letting you gather grain with his young women. Tonight he will be winnowing barley at the threshing floor. 3 Now do as I tell you-take a bath and put on perfume and dress in your nicest clothes. Then go to the threshing floor, but don't let Boaz see you until he has finished eating and drinking. 4 Be sure to notice where he lies down; then go and uncover his feet and lie down there. He will tell you what to do." 5 "I will do everything you say," Ruth replied.
6 So she went down to the threshing floor that night and followed the instructions of her mother-in-law. 7 After Boaz had finished eating and drinking and was in good spirits, he lay down at the far end of the pile of grain and went to sleep. Then Ruth came quietly, uncovered his feet, and lay down. 8 Around midnight Boaz suddenly woke up and turned over. He was surprised to find a woman lying at his feet!
Matthew Henry's Commentary on Ruth 3:2-8
Commentary on Ruth 3:1-5
(Read Ruth 3:1-5)
The married state should be a rest, as much as any thing upon earth can be so, as it ought to fix the affections and form a connexion for life. Therefore it should be engaged in with great seriousness, with earnest prayers for direction, for the blessing of God, and with regard to his precepts. Parents should carefully advise their children in this important concern, that it may be well with them as to their souls. Be it always remembered, That is best for us which is best for our souls. The course Naomi advised appears strange to us; but it was according to the laws and usages of Israel. If the proposed measure had borne the appearance of evil, Naomi would not have advised it. Law and custom gave Ruth, who was now proselyted to the true religion, a legal claim upon Boaz. It was customary for widows to assert this claim, Deuteronomy 25:5-10. But this is not recorded for imitation in other times, and is not to be judged by modern rules. And if there had been any evil in it, Ruth was a woman of too much virtue and too much sense to have listened to it.
Commentary on Ruth 3:6-13
(Read Ruth 3:6-13)
What in one age or nation would be improper, is not always so in another age or another nation. Being a judge of Israel, Boaz would tell Ruth what she should do; also whether he had the right of redemption, and what methods must be taken, and what rites used, in order to accomplishing her marriage with him or another person. The conduct of Boaz calls for the highest praise. He attempted not to take advantage of Ruth; he did not disdain her as a poor, destitute stranger, nor suspect her of any ill intentions. He spoke honourably of her as a virtuous woman, made her a promise, and as soon as the morning arrived, sent her away with a present to her mother-in-law. Boaz made his promise conditional, for there was a kinsman nearer than he, to whom the right of redemption belonged.