Parallel
Genesis 19:36
Westminster Leningrad Codex · Berean Standard Bible
וַֽתַּהֲרֶ֛יןָ שְׁתֵּ֥י בְנֽוֹת־ ל֖וֹט מֵאֲבִיהֶֽן׃
Thus both of Lot’s daughters became pregnant by their father.