Wherewith - they honor God and man - I believe the word אלהים elohim here should be translated gods, for the parable seems to be accommodated to the idolatrous state of the Shechemites. Thus it was understood by the Vulgate, Arabic, and others. It is true that olive oil was often used in the service of God: the priests were anointed with it; the lamps in the tabernacle lighted with it; almost all the offerings of fine flour, cakes prepared in the pan, etc., had oil mingled with them; therefore Jotham might say that with it they honor God; and as priests, prophets, and kings were anointed, and their office was the most honorable, he might with propriety say, therewith they honor man. But I am persuaded he used the term in the first sense. See on Judges 9:13; (note).
This fable and that noted in the marginal reference are the only two of the kind found in Scripture. Somewhat different are the parables of the Old Testament, 2 Samuel 12:1-4; 2 Samuel 14:5-11; 1 Kings 20:39-40.
Judges 9:9
Honour God and man - Alluding to the constant use of oil in the meat-offerings Exodus 30:24-25. In like manner, the allusion in Judges 9:13 is to the drink-offerings of wine. See Leviticus 23:13; Numbers 15:10.
Judges 9:14
The bramble - Said to be the Rhamnus Paliurus of Linnaeus, otherwise called Spina-Christi, or Christ‘s Thorn, a shrub with sharp thorns. The application is obvious. The noble Gideon and his worthy sons had declined the proffered kingdom. The vile, base-born Abimelech had accepted it, and his act would turn out to the mutual ruin of himself and his subjects.
Judges 9:15
If in truth - i. e. consistently with truth, honor, and uprightness, as explained in the interpretation in Judges 9:16, Judges 9:19.
Let fire come out - The propriety of the image is strictly preserved, for even the thorns of the worthless bramble might kindle a flame which would burn the stately cedars to the ground. See Psalm 58:9.
Judges 9:16-20
These verses contain the interpretation of the fable. In them Jotham points out the base ingratitude of the people in raising Abimelech upon the ruin of Gideon‘s house, and foretells the retribution which would fall upon both parties.