29 Some in fact thought (supposed; imagined), since Judah (Judas) had been holding (in possession of) the money box, that Jesus is saying to him, "Buy at the marketplace things of which we presently have need [as we enter] into the feast [days]," or, "for the poor ones," so that He could give something.
John 13:29 Cross References - JMNT
John 12:5-6
5 "Why (Through what [reason; situation]) was this perfumed ointment not sold for three hundred denarii (= a year's wages) and given to (or: for) destitute (poor) people?"
6 He said this, though, not because it was normally a care (or: of interest) to him about the destitute (the poor people), but rather, because he had been existing as a thief, and, normally holding (or: having; [other MSS: used to be in possession of]) the money box (or: case; originally a receptacle for the "tongues" {i.e., mouth-pieces} of musical instruments), had been regularly carrying (or: bearing) the things being repeatedly (or: habitually) deposited. [note: the verb of being is the imperfect tense, and can refer to past practice; thus, John is not necessarily saying that Judas was currently a thief, but is pointing out his disposition toward money; the verb for carrying (bearing) can also be used in the sense of "bearing away," "removing," or "pilfering;" or, it can be used to signify "supporting; providing for" – this latter giving a different slant to John's words. Recall that Mark says that "some" had indignation, and Matt. says "the disciples" did, so Judas expressed a consensus. Also, in Matt. 26:6, they were in the same town, but at a different place – the house of Simon the leper – and an anonymous woman enters while they are eating, and this time pours the costly ointment on His head. Jesus gives a response similar to below]
John 13:1
1 Now before the festival (or: feast) of the Passover, Jesus, having seen and thus knowing that His hour comes (or: came) – to the end that He could (or: should; may; would) change His steps and move (walk differently; transfer; pass over to another place) from out of the midst of this world (ordered System; secular society; human aggregate; universe) toward the Father – loving His own [people? mankind? friends? disciples? created ones?]: those within the world (the System; society; the ordered universe), He loves them unto the end (or: the goal and attained destiny; the finished, purposed product; the accomplished and completed work; the consummation; or: = to the uttermost).
Acts 20:34-35
34 "You yourselves continue knowing by personal experience that these very hands subserved to my needs, as well as [giving service] to those being with me.
35 "I demonstrated under your observation, giving you an object lesson for all situations and for all people, that by thus laboring it continues binding and necessary to habitually take things in hand so as to assist in the stead of the weak and infirm folks, besides to be constantly bearing in mind through remembrance the words (thoughts; ideas; messages) of the Lord Jesus, that He said, 'It is a happy and blessed [state and situation] to be habitually giving, rather than to be continually receiving!'"
Galatians 2:10
10 [the] only [concern being] that we would habitually be mindful of the poor ones (or: should keep on remembering the destitute folks), which very thing, also, I was eager and made every effort to do.
Ephesians 4:28
28 Let the person habitually stealing no longer continue stealing, but rather let him be normally spent with labor, constantly working (performing; doing the business of) the good (the profitable; the virtuous; quality) by his own hands, to the end that he can continuously have (or: possess) [something] [in order] to repeatedly share with the one constantly having a need.