Revelation 17:16, they will burn her with fire

Leviticus speaks of one woman in a priest's family under Israel's law; John speaks of a city-woman and of enemies, not judges, doing the burning. John does not mention priests. Since burning was the normal fate of captured cities, the picture works without Leviticus, so this is only a possible echo.

If the law is in view, Beale says, it fits the part of Babylon made up of compromisers within the church, a kingdom of priests (1:6). Wright reads the scene as drawn partly from the law's punishment of a whore and partly from Isaiah's fall of Babylon. Either way her end is just.

Beale suggests Leviticus 21:9 contributed to the picture of the harlot's burning, since there the daughter of a priest who profanes herself by harlotry is to be burned. He thinks it especially apt for the compromisers in the church, a kingdom of priests, and notes that the harlot's attire matches the high priest's clothing in the Greek of Exodus 28. Keener mentions the suggestion as worthy of note but less likely than Daniel 7:11, the burning of the beast, or the normal burning of captured cities (Amos 1:4), and the rumor that Nero burned Rome. The NIV Cultural Backgrounds Study Bible lists Genesis 38:24, Leviticus 20:14 and 21:9 for burning as the penalty for disgraceful promiscuity, as well as conquered cities (Joshua 6:24) and the beast (Daniel 7:11). The CSB Study Bible's cross-references give Leviticus 20:14 and 21:9. Wright says the scene is drawn partly from the biblical punishment of a whore (Leviticus 21:9). Katakauthesetai in 18:8 is the same form as in the Greek of Leviticus 21:9, a point drawn here. The grade is possible: four sources name it, but the picture fits other backgrounds too.