Luke 11:44

This “woe” is evidently adapted for Gentile use. In Mt. the sepulchres are made conspicuous by white-washing to warn passers-by, and the point is the contrast between the fair exterior and the inner foulness. Here the graves become invisible (ἄδηλα, in this sense here only in N.T.; cf. 1 Corinthians 14:8) and the risk is that of being in the presence of what is offensive without knowing. Farrar (C. G. T.) suggests that the reference may be to Tiberias, which was built on the site of an old cemetery.