Contradiction with 1 Corinthians 10:31
This verse says to do everything for the glory of God, while Zechariah 7:6 points out doing things for oneself rather than for God.
1 Corinthians 10:31: Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God.
Contradiction with Matthew 6:1
This verse advises against doing things for self-glory, contradicting Zechariah 7:6 where actions are done for oneself.
Matthew 6:1: Take heed that ye do not your alms before men, to be seen of them: otherwise ye have no reward of your Father which is in heaven. [alms: or, righteousness] [of your: or, with your]
Contradiction with Colossians 3:23
Advises to work heartily as for the Lord, not for men, counter to actions for one's own sake as in Zechariah 7:6.
Colossians 3:23: And whatsoever ye do, do [it] heartily, as to the Lord, and not unto men;
Contradiction with Luke 12:19-21
Illustrates a warning against self-indulgence, contrasting with self-focused actions in Zechariah 7:6.
Luke 12:19-21: And I will say to my soul, Soul, thou hast much goods laid up for many years; take thine ease, eat, drink, [and] be merry.
Contradiction with Philippians 2:3-4
Encourages looking to the interests of others, opposing self-centered practices critiqued in Zechariah 7:6.
Philippians 2:3-4: [Let] nothing [be done] through strife or vainglory; but in lowliness of mind let each esteem other better than themselves.