- According to Josephus, he lived at the time of Eli. Son of Rachab and Salma, he was a rich landowner who noticed Ruth, the widowed Moabite daughter-in-law of Naomi, a relative of hers, gleaning grain from his fields. He soon learns of the difficult circumstances her family is in and Ruth's loyalty to Naomi. In response, Boaz invites her to eat with him and his workers regularly as well as deliberately leaving grain for her to claim while keeping a protective eye on her. It should be noted that the tradition of Boaz descending from a Canaanite prostitute stems from confusion regarding the identity of the mother of Boaz, who is not mentioned in the Tanakh but is in the Genealogical record of Matthew; Because they have the same name some people believe she is the same person mentioned in Joshua, but that is not supported by linguistic and textual evidence.
Boaz married Ruth and, consequently, preserved the name of Elimelech, Naomi's deceased husband, a sort of levirate. Their firstborn was considered a son of Elimelech's lineage (Rt-4.5, 10). Boaz purchased the family lands that Naomi had sold, and restituted them to Elimelech's lineage (vv. 3, 7–10). For those substituting, redeeming factors, Ruth's husband is considered by Christians to be a type of Jesus of Nazareth, whom they consider to be the Messiah.
Although Boaz is noted to be much older than Ruth in the traditional account and he marries her for Naomi's sake, most dramatic adaptations have Boaz as a handsome young man so as to enhance the romantic nature of the story.
Their son was Obed, father of Jesse, and grandfather of David. Boaz is mentioned in both the Gospel of Matthew and the Gospel of Luke as an ancestor of Jesus, "according to the flesh".
- Meeting of Lot and Boas