Deuteronomy 28:40

Thou shalt have olive trees throughout thy coasts
In the several parts of the land of Canaan, which is therefore called a land of olive oil, ( Deuteronomy 8:8 ) ;

but thou shalt not anoint [thyself] with the oil;
nor any other relations, friends, guests, as was usual at entertainments; see ( Psalms 23:5 ) ( Luke 7:38 Luke 7:46 ) ; for the phrase "thyself" is not in the text. The reason why they should not anoint is, because they would have no oil to anoint with:

for thine olive shall cast [his fruit];
before it is ripe, by one means or another, as by winds, or blasting and mildew; see ( Amos 4:9 ) ( Habakkuk 3:17 ) .