See this passage explained in the notes at Matthew 26:3-16.

John 12:2

A supper - At the house of Simon the leper, Matthew 26:6.

Lazarus was ... - The names of Martha and Lazarus are mentioned because it was not in their own house, but in that of Simon. Lazarus is particularly mentioned, since it was so remarkable that one who had been once dead should be enjoying again the endearments of friendship. This shows, also, that his resurrection was no illusion - that he was really restored to the blessings of life and friendship. Calmet thinks that this was about two months after his resurrection, and it is the last that we hear of him. How long he lived is unknown, nor is it recorded that he made any communication about the world of spirits. It is remarkable that none who have been restored to life from the dead have made any communications respecting that world. See Luke 16:31, and the notes at 2 Corinthians 12:4.

There they made him a supper,.... At Bethany, in the house of Lazarus, Martha, and Mary; by whose order, and at whose charge it was prepared for him; and not in the house of Simon the leper, which was four days after this, Matthew 26:2.

And Martha served; who was always a busy, active, and stirring woman; and this she did, to testify her love to Christ, and great respect for him; otherwise, as she was a person of substance, she had servants enough to wait at table:

but Lazarus was one of them that sat at the table with him; and ate, and drank, and conversed; by which it appeared, that he was really risen from the dead, and was in a good state of health.

There they made him a supper; and Martha served: but Lazarus was one of them that sat at the table with him.

12:2 There they made him a supper. For notes on this supper and the anointing, see Mt 26:6-16. Compare Mr 14:3-11 Lu 7:36-50.

12:2 It seems Martha was a person of some figure, from the great respect which was paid to her and her sister, in visits and condolences on Lazarus's death, as well as from the costly ointment mentioned in the next verse . And probably it was at their house our Lord and his disciples lodged, when he returned from Jerusalem to Bethany, every evening of the last week of his life, upon which he was now entered.

2. Martha served-This, with what is afterwards said of Mary's way of honoring her Lord, is so true to the character in which those two women appear in Lu 10:38-42, as to constitute one of the strongest and most delightful confirmations of the truth of both narratives. (See also on Joh 11:20).

Lazarus . sat at the table-"Between the raised Lazarus and the healed leper (Simon, Mr 14:3), the Lord probably sits as between two trophies of His glory" [Stier].

12:1-11 Christ had formerly blamed Martha for being troubled with much serving. But she did not leave off serving, as some, who when found fault with for going too far in one way, peevishly run too far another way; she still served, but within hearing of Christ's gracious words. Mary gave a token of love to Christ, who had given real tokens of his love to her and her family. God's Anointed should be our Anointed. Has God poured on him the oil of gladness above his fellows, let us pour on him the ointment of our best affections. In Judas a foul sin is gilded over with a plausible pretence. We must not think that those do no acceptable service, who do it not in our way. The reigning love of money is heart-theft. The grace of Christ puts kind comments on pious words and actions, makes the best of what is amiss, and the most of what is good. Opportunities are to be improved; and those first and most vigorously, which are likely to be the shortest. To consult to hinder the further effect of the miracle, by putting Lazarus to death, is such wickedness, malice, and folly, as cannot be explained, except by the desperate enmity of the human heart against God. They resolved that the man should die whom the Lord had raised to life. The success of the gospel often makes wicked men so angry, that they speak and act as if they hoped to obtain a victory over the Almighty himself.