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Olive trees are frequently mentioned in Scripture.
It is mentioned in the first Old Testament parable, that of Jotham (Judg. 9:9), and is named among the blessings of the “good land,” and is at the present day the one characteristic tree of Palestine. The oldest olive-trees in the country are those which are enclosed in the Garden of Gethsemane.
In Rom. 11:17 Paul refers to the practice of grafting shoots of the wild olive into a “good” olive which has become unfruitful. By such a process the sap of the good olive, by pervading the branch which is “graffed in,” makes it a good branch, bearing good olives. Thus the Gentiles, being a “wild olive,” but now “graffed in,” yield fruit, but only through the sap of the tree into which they have been graffed. This is a process “contrary to nature” (11:24).