And say, if we had been in the days of our fathers,.... Their ancestors and predecessors: signifying, that if they had lived in the times they did, or had been in the same post and office with them, they should have opposed, at least not consented to their measures:

we would not have been partakers with them in the blood of the prophets; would not have joined them in persecuting the prophets, and in shedding their blood, and putting them to death; but would have received them as the prophets of the Lord, have hearkened to their advice and message, and have honoured and obeyed them as such; and this they thought they sufficiently declared, by building and adorning their tombs.

Woe unto you, scribes and Pharisees, hypocrites! for ye are like whited sepulchres--or, whitewashed sepulchres. (Compare Act 23:3). The process of whitewashing the sepulchres, as LIGHTFOOT says, was performed on a certain day every year, not for ceremonial cleansing, but., as the following words seem rather to imply, to beautify them.

which indeed appear beautiful outward, but are within full of dead men's bones, and of all uncleanness--What a powerful way of conveying the charge, that with all their fair show their hearts were full of corruption! (Compare Psa 5:9; Rom 3:13). But our Lord, stripping off the figure, next holds up their iniquity in naked colors.

Wherefore ye be witnesses unto yourselves, that ye are the children of them which killed the prophets--that is "ye be witnesses that ye have inherited, and voluntarily served yourselves heirs to, the truth-hating, prophet-killing, spirit of your fathers." Out of pretended respect and honor, they repaired and beautified the sepulchres of the prophets, and with whining hypocrisy said, "If we had been in their days, how differently should we have treated these prophets?" While all the time they were witnesses to themselves that they were the children of them that killed the prophets, convicting themselves daily of as exact a resemblance in spirit and character to the very classes over whose deeds they pretended to mourn, as child to parent. In Luk 11:44 our Lord gives another turn to this figure of a grave: "Ye are as graves which appear not, and the men that walk over them are not aware of them." As one might unconsciously walk over a grave concealed from view, and thus contract ceremonial defilement, so the plausible exterior of the Pharisees kept people from perceiving the pollution they contracted frown coming in contact with such corrupt characters.