Jamieson, Fausset and Brown on Luke 13:6-9

6-9. fig tree--Israel, as the visible witness of God in the world, but generally all within the pale of the visible Church of God; a familiar figure (compare Is 5:1-7; Joh 15:1-8, &c.).

vineyard--a spot selected for its fertility, separated from the surrounding fields, and cultivated with special care, with a view solely to fruit.

came and sought fruit--a heart turned to God; the fruits of righteousness; compare Mt 21:33, 34, and Is 5:2, "He looked that it should bring forth fruit"; He has a right to it, and will require it.