How is the wedding garment significant in the parable of the banquet?

In the parable of the wedding banquet found in Matthew 22, the wedding garment represents the righteousness of Christ that is essential for a believer's acceptance into the heavenly banquet. When the king notices a guest without a wedding garment, it signifies a rejection of the provision that was offered, reflecting pride and self-sufficiency. This refusal to wear the provided garment illustrates an individual's attempt to approach God on their own merit rather than through faith in Christ's righteousness. The absence of the garment results in being cast out, emphasizing the necessity of Christ’s imputed righteousness for salvation. Therefore, the wedding garment is a powerful reminder of the grace that believers receive in being clothed with Christ, ensuring they are presented before God without blemish.