Contradiction with 1 Kings 8:66
Numbers 7:8 describes the offering given for the service of the Levites during the Tabernacle. 1 Kings 8:66 portrays the people blessing the king and going to their tents joyful and glad of heart, a more celebratory scene rather than one of offering and service.
1 Kings 8:66: On the eighth day he sent the people away: and they blessed the king, and went unto their tents joyful and glad of heart for all the goodness that the LORD had done for David his servant, and for Israel his people. [blessed: or, thanked]
Contradiction with Matthew 21:12
Numbers 7:8 depicts the giving of offerings for religious service, while Matthew 21:12 discusses Jesus driving out those buying and selling in the temple, showing a contrast in reverence and condemnation of commerce in religious spaces.
Matthew 21:12: And Jesus went into the temple of God, and cast out all them that sold and bought in the temple, and overthrew the tables of the moneychangers, and the seats of them that sold doves,