(And Mary was she that anointed the Lord with ointment, and wiped his feet with her hair: whose brother Lazarus was sick.)

and it was Mary who did anoint the Lord with ointment, and did wipe his feet with her hair, whose brother Lazarus was ailing,

(The Mary whose brother Lazarus was ill, was the Mary who put perfumed oil on the Lord and made his feet dry with her hair.)

This Mary, whose brother Lazarus was ill, was the Mary who anointed the Master with perfume, and wiped his feet with her hair.

It was that Mary who anointed the Lord. It is a similar display of ignorance, to imagine that this Mary, the sister of Lazarus, was that woman of wicked and infamous life, who is mentioned by Luke, (Luke 7:37.) This mistake was occasioned by the anointing; as if it were not evident enough that Christ was anointed on various occasions, and even at different places. The woman who was a sinner, of whom Luke gives an account, anointed Christ at Jerusalem, where he dwelt; but Mary afterwards anointed him at Bethany, which was her own village. The past tense employed by the Evangelist, who anointed, must be referred, not to the time of the occurrence which he is now relating, but to the time when he wrote; as if he had said, "It was this Mary who afterwards poured on the head of Christ the ointment, on account of which a murmuring arose among the disciples," (Matthew 26:7.)

It was that Mary - See the Matthew 26:6 note; Luke 7:36-50 notes.

It was that Mary which anointed - There is much disagreement between learned men relative to the two anointings of our Lord, and the persons who performed these acts. The various conjectures concerning these points the reader will find in the notes on Matthew 26:7, etc., but particularly at the end of that chapter. Dr. Lightfoot inquires, Why should Bethany be called the town of Martha and Mary, and not of Lazarus? And he thinks the reason is, that Martha and Mary had been well known by that anointing of our Lord, which is mentioned Luke 7:37; (see the note there); but the name of Lazarus had not been mentioned till now, there being no transaction by which he could properly be brought into view. He therefore thinks that the aorist αλειψασα, which we translate anointed, should have its full force, and be translated, who had formerly anointed; and this he thinks to have been the reason of that familiarity which subsisted between our Lord and this family; and, on this ground, they could confidently send for our Lord when Lazarus fell sick. This seems a very reasonable conjecture; and it is very likely that the familiarity arose out of the anointing.
Others think that the anointing of which the evangelist speaks is that mentioned John 12:1, etc., and which happened about six days before the passover. St. John, therefore, is supposed to anticipate the account, because it served more particularly to designate the person of whom he was speaking.

It was that Mary which anointed the Lord with ointment,.... Not the woman in Luke 7:37, as some have thought, whose name is not mentioned, and which history is not related by John at all: but Mary in John 12:3, who is both mentioned by name, and along with Lazarus her brother, and with whom all the circumstances of the affair suit; and though the fact was not yet done, yet John writing many years after it was done, and when it was well known, proleptically, and in a parenthesis, takes notice of it here:
and wiped his feet with her hair; instead of a napkin, after she had anointed them with oil; See Gill on Luke 7:37, See Gill on John 12:3.
Whose brother Lazarus was sick; this is observed, to show how well they were all acquainted with Christ, and affected to him.

It was that Mary who anointed the Lord with ointment, &c.--This, though not recorded by our Evangelist till John 12:3, was so well known in the teaching of all the churches, according to our Lord's prediction (Matthew 26:13), that it is here alluded to by anticipation, as the most natural way of identifying her; and she is first named, though the younger, as the more distinguished of the two. She "anointed THE LORD," says the Evangelist--led doubtless to the use of this term here, as he was about to exhibit Him illustriously as the Lord of Life.

It was that Mary. As there are several New Testament Marys, John points out this one by the well known incident of the anointing described in John 12:1-11.

It was that Mary who afterward anointed, &c. She was more known than her elder sister Martha, and as such is named before her.