Ruth 3:13Meaning & Commentary from the Church Fathers

Upon recognizing Ruth's goodness, respect for her mother-in-law, devotion to her late husband, and steadfast faith in God, Boaz, who was the great-grandfather of David, took Ruth to be his wife in accordance with the Mosaic law, aiming to preserve the lineage of his deceased kinsman (cf. Deut. 25:5; Mk. 12:19; Lk. 20:28).

However, because there is another relative present, I must engage with him first, so that he may marry you, if he is willing, in accordance with the law. If he declines, I will take you as my wife. This is the character of this potential husband! If a beautiful young woman had approached him under cover of night, he would have preserved his purity and left the decision to the law. He did not hastily pursue marriage against the law but extended a marriage proposal to the nearest family member.