10 YHWH said to Moses, “Go to the people, and sanctify them today and tomorrow, and let them wash their garments, 11 and be ready for the third day; for on the third day YHWH will come down in the sight of all the people on Mount Sinai. Exodus 19:10-11WEB
This passage contains a positive command, directed toward Israel through Moses: "Sanctify yourselves today and tomorrow, wash your garments, and be ready for the third day".
The command was immediately fulfilled by Moses, who led the people of Israel in sanctification to prepare for the third day. The command finds its ultimate fulfillment in Jesus, who sanctifies us (Hebrews 10:8-10), and who washes us in the blood of his sacrifice (1 John 1:7), clothing us with salvation in the righteousness of Christ (Isaiah 61:10).
Notes on Interpretation/Application