Bastard
A bastard, in the legal vocabulary of the UPDV, is a child born outside the bond of lawful marriage. The term carries weight in Israelite assembly law, surfaces in named instances across the patriarchal and judges narratives, and is reused as a figurative jab in prophecy and a pastoral image in Hebrews.
Excluded from the Assembly
The Mosaic statute is blunt and far-reaching: "A bastard will not enter into the assembly of Yahweh; even to the tenth generation will none of his enter into the assembly of Yahweh" (De 23:2). The exclusion is not for one generation but for ten, attaching to the lineage rather than only to the individual.
Ishmael
The earliest instance is Ishmael. Sarai gives her Egyptian slave Hagar to Abram as a second wife after a decade of barrenness: "And Sarai, Abram's wife, took Hagar the Egyptian, her slave, after Abram had dwelt ten years in the land of Canaan, and gave her to Abram her husband to be his wife" (Ge 16:3). Hagar bears the son: "And Hagar bore Abram a son: and Abram called the name of his son, whom Hagar bore, Ishmael" (Ge 16:15).
Paul looks back on the same household and frames it in two-mother terms: "For it is written, that Abraham had two sons, one by the slave woman, and one by the free woman" (Ga 4:22). The contrast — slave-born Ishmael against free-born Isaac — is what keys this passage to the umbrella.
Moab and Ammon
The next instances arise from the cave outside Zoar. Lot's daughters conceive by their father: "Thus were both the daughters of Lot pregnant by their father" (Ge 19:36). The two sons born of that incest become the eponymous ancestors of two later peoples. The firstborn "bore a son, and named him Moab: the same is the father of the Moabites to this day" (Ge 19:37). The younger "also bore a son, and named him Ben-ammi: the same is the father of the sons of Ammon to this day" (Ge 19:38).
Jephthah
Among the judges, Jephthah is identified by birth as well as by valor: "Now Jephthah the Gileadite was a mighty man of valor, and he was the son of a whore: and Gilead begot Jephthah. And Gilead's wife bore him sons; and when his wife's sons grew up, they drove out Jephthah, and said to him, You will not inherit in our father's house; for you are the son of another woman" (Jud 11:1). The expulsion from his father's house is grounded explicitly in his mother's status; the same passage that names him a fighter names him an outsider in the family inheritance.
David's Child by Bathsheba
The Davidic instance is the conception itself. From the roof of the king's house David sees Bathsheba bathing, sends for her, and lies with her while her husband Uriah is away at war: "And David sent messengers, and took her; and she came in to him, and he plowed her, for she was purified from her uncleanness; and she returned to her house. And the woman became pregnant; and she sent and told David, and said, I am pregnant" (2Sa 11:4-5). The child filed under this umbrella is the one she carries home that day — a child conceived outside marriage, within the king's household.
Figurative Uses
The term is then turned outward as image. In Zechariah's oracle against the Philistine cities, the displacement of native population by an outsider line is named in this vocabulary: "And a bastard will dwell in Ashdod, and I will cut off the pride of the Philistines" (Zec 9:6).
Hebrews flips the polarity of the term and uses it pastorally. Discipline, the writer argues, is the mark of true sonship, and its absence is the mark of the opposite: "But if you⁺ are without chastening, of which all have been made sharers, then you⁺ are bastards, and not sons" (Heb 12:8). What the law excludes from the assembly, the epistle uses as the negative term in a test: undisciplined children are bastards; chastened children are sons.