And I said unto him, sir, thou knowest,.... John replies in a very humble, modest, and respectful manner, to the elder, calling him "sir", according to the usage of the eastern people; and it is observable, that this word is much used in his Gospel, and more than in any other book; see Joh 4:11.
Some copies, and the Complutensian edition, read, "my Lord"; and so do the Vulgate Latin, Syriac, and Arabic versions. John confesses his ignorance, and ascribes knowledge to the elder, and desires information of him; for the sense is, that the elder knew who they were, and from whence they came, but he did not, and therefore desires that he would inform him; and so the Arabic version renders it, "and my Lord, thou art more learned"; that is, than I am, and therefore instruct me, as he accordingly did;and he said to me, these are they which came out of great tribulation: seeing this company designs all the elect of God, that ever were, are, or shall be in the world; "the great tribulation", out of which they came, is not to be restrained to any particular time of trouble, but includes all that has been, is, or shall be; as all the afflictions of the saints under the Old Testament; from righteous Abel to Zechariah; and all the troubles of the people of God in the times of the Maccabees, Heb 11:35; all the persecutions of the Christians by the Jews, at the first publication of the Gospel; and the persecutions under the Roman emperors, both Pagan and Arian; and the cruelties and barbarities of the Romish antichrist, during the whole time of the apostasy; and particularly the last struggle of the beast, which will be the hour of temptation, that will come upon all the world; and in general all the afflictions, reproaches, persecutions, and many tribulations of all the saints, and every member of Christ in this world, who in the new Jerusalem church state will be come out of them; which supposes them to have been in them, and yet were not overwhelmed by them, and lost in them; but, by divine support and assistance, waded through them, and were now quite clear of them, and never more to be annoyed with them; see Re 21:4.
And have washed their robes, and made them white in the blood of the Lamb; not in the blood of bulls and goats, which could not take away sin; nor in their own blood, their sufferings for Christ, on which they did not depend, knowing there is no comparison between them, and the glory revealed in them; nor in any works of righteousness done by them, which are imperfect and filthy, and need washing; but in the blood of Christ, which cleanseth from all sin.
The "robes" which they washed in his blood may either design themselves, their consciences, which this blood purges from dead works; or their outward conversation garments, which have their spots, and need continual washing; or else the robe of righteousness, and garments of salvation, or their justification, which is by the blood of Christ, Ro 5:9.
The act of washing from sin, by the blood of Christ, is sometimes ascribed to Christ himself, as in Re 1:5; but here to the saints, and designs the concern which faith has in the blood of Christ, which deals with it for justification, peace, and pardon, for the removing of sin from the conscience, and for cleansing from all impurity, both of flesh and Spirit: and the effect of this is, that their robes were "made white"; that is, that they were freed from all sin, were without fault before the throne, not having spot, or wrinkle, or any such thing.