6 Bible Verses about Illegitimate Children

An illegitimate child may not come into the assembly of Yahweh; even [to] the tenth generation none {of his descendants} may come into the assembly of Yahweh.

And the two daughters of Lot became pregnant by their father. The firstborn gave birth to a son, and she called his name Moab. He [is] the father of Moab until this day. And the younger, she also gave birth to a son, and she called his name Ben-Ammi. He [is] the father of the {Ammonites} until this day.

{And in the course of time} the daughter of Shua, the wife of Judah, died. When Judah was consoled he went up to his sheepshearers, he and his friend Hirah the Adullamite, to Timnah. And it was told to Tamar, saying, "Look, your father-in-law is going up to Timnah to shear his sheep." So she removed the clothes of her widowhood and covered [herself] with the veil and disguised herself. And she sat at the entrance to Eynayim, which [is] on the way to Timnah, for she saw that Shelah was grown but she had not been given to him as a wife.read more.
And Judah saw her and reckoned her to [be] a prostitute, for she had covered her face. And he turned aside to her at the roadside and said, "Please come, let me come in to you," for he did not know that she [was] his daughter-in-law. And she said, "What will you give to me that you may come in to me?" And he said, "I will send a kid from the goats of the flock." And she said, "[Only] if you give a pledge until you send [it]." And he said, "What [is] the pledge that I must give to you?" And she said, "your seal, your cord, and your staff that [is] in your hand." And he gave [them] to her and went in to her. And she conceived by him. And she arose and left, and she removed her veil from herself and put on the garments of her widowhood. And Judah sent the kid from the goats by the hand of his friend the Adullamite to take [back] the pledge from the hand of the woman, but he could not find her. So he asked the men of her place, saying, "Where [is] that cult prostitute [that was] at Eynayim by the roadside?" And they said, "There is no cult prostitute here." Then he returned to Judah and said, "I could not find her. Morever, the men of the place said, 'There is no cult prostitute here.'" And Judah said, "Let her take [them] for herself, lest we be {laughed at}. Behold, I sent this kid, but you could not find her." And {about three months later} it was told to Judah, "Tamar your daughter-in-law has played the whore, and now, behold, she has conceived by prostitution." And Judah said, "Bring her out and let her be burned." She was brought out, but she sent to her father-in-law saying, "By the man to whom these [belong] I have conceived." And she said, "Now discern to whom these [belong]: the seal and cord and the staff." Then Judah recognized [them] and said, "She is more righteous than I, since I did not give her to my son Shelah." And he did not know her again. And it happened [that] at the time she gave birth that, behold, twins [were] in her womb. And it happened [that] at her labor one [child] put out a hand. And the midwife took [it] and tied a crimson thread on his hand saying, "This [one] came out first." Then his hand drew back and, behold, his brother came out, and she said, "What a breach you have made for yourself!" And she called his name Perez. And afterward his brother who [had] the crimson thread on his hand came out. And his name was called Zerah.

Jephthah the Gileadite was a mighty warrior; he was the son of a prostitute, and {Gilead was his father}.

A mongrel people will dwell in Ashdod, and I will cut down the pride of [the] Philistines.

But if you are without discipline, in which all [legitimate sons] have become participants, then you are illegitimate and not sons.