19 And not only has he no kisses, but neither has he oil wherewith to anoint the feet of Christ, for if he had oil he would certainly, before now, soften his own neck.
Moses says: “This people is stiff-necked,” and the Lord says that the priest and the Levite passed by, and neither of them poured oil or wine into the wounds of him who had been wounded by robbers; for they had nothing to pour in, since if they had had oil they would have poured it into their own wounds. But Isaiah declares: “They cannot apply ointment nor oil nor bandage.”
Source: Letters (New Advent)