In the Bible, “offspring” (or “seed,” “descendants,” “children”) is sometimes used non-literally—to describe people who belong to, resemble, follow, or arise from someone or something, rather than literal biological children of a heavenly parent.
A few clear examples:
Genesis 3:15 — “offspring/seed” of the woman and “offspring/seed” of the serpent. The serpent's offspring are not presented as literal children biologically fathered by the serpent. The language is commonly understood as referring to those aligned with the serpent and those opposed to him.
Matthew 3:7 / Luke 3:7 — John the Baptist calls the Pharisees and Sadducees a “brood of vipers.” This is figurative lineage language: they are characterized as belonging to or resembling vipers, not literally descended from snakes.
John 8:39–44 — Jesus distinguishes physical descent from figurative “fatherhood.” The people say, “Abraham is our father,” but Jesus says that if they were truly Abraham's children, they would do Abraham's works. He then says, “You are of your father the devil.”
The point is spiritual/moral affiliation, not biological descent.
Romans 4:11–12, 16–18 — Paul describes Abraham as the “father” of those who have faith, including Gentiles who are not his biological descendants. “Father” and “offspring” language is therefore used relationally/representatively.
Galatians 3:7, 29 — “Those of faith are the sons of Abraham” and “if you are Christ's, then you are Abraham's offspring.” Most of these people are not Abraham's literal biological descendants; the designation is based on faith and covenant relationship.
Revelation 12:17 — the dragon goes to make war against “the rest of her offspring,” identified as those “who keep the commandments of God and hold to the testimony of Jesus.” Again, “offspring” functions as an identity/relationship metaphor rather than ordinary biological parentage.