How do we know the importance of washing in the tabernacle?

The washing at the brazen laver was not merely a ritual but an essential requirement for the priests serving in the tabernacle. As stated in Exodus 30:20, failure to wash meant death for the priest. This highlights the gravity of approaching God without being spiritually pure. In the context of New Testament teaching, the laver symbolizes the application of Christ's sacrifice through the Holy Spirit's work in believers, making it imperative for Christians to continually seek cleansing from sin through Christ. Thus, the act of washing points to the necessity for ongoing spiritual cleansing in the believer's life.