Judges 9:20

20 and if not -- fire cometh out from Abimelech and devoureth the masters of Shechem and the house of Millo, and fire cometh out from the masters of Shechem and from the house of Millo, and devoureth Abimelech.'

Judges 9:20 Meaning and Commentary

Judges 9:20

But if not
If it appeared that they had not acted uprightly and sincerely in this matter:

let fire come out of Abimelech, and devour the men of Shechem, and the
house of Millo;
let wrath, rage, and fury, break out from Abimelech like fire, and issue in the destruction of those that made him king, both those of Shechem and of Millo:

and let fire come out from the men of Shechem, and from the house of
Millo, and devour Abimelech;
let them be incensed against Abimelech, and seek his ruin, and procure it: the sense is, that he wishes that strife, contention, and quarrels, might arise among them, and they mutually destroy each other; the words are imprecative of evil upon them both, and which had its exact fulfilment.

Judges 9:20 In-Context

18 and ye have risen against the house of my father to-day, and slay his sons, seventy men, on one stone, and cause Abimelech son of his handmaid to reign over the masters of Shechem, because he [is] your brother --
19 yea, if in truth and in sincerity ye have acted with Jerubbaal and with his house this day, rejoice ye in Abimelech, and he doth rejoice -- even he -- in you;
20 and if not -- fire cometh out from Abimelech and devoureth the masters of Shechem and the house of Millo, and fire cometh out from the masters of Shechem and from the house of Millo, and devoureth Abimelech.'
21 And Jotham hasteth, and fleeth, and goeth to Beer, and dwelleth there, from the face of Abimelech his brother.
22 And Abimelech is prince over Israel three years,
Young's Literal Translation is in the public domain.