Moses and Aaron went from the presence of the assembly; partly to avoid the growing rage of the people, for God's singular protection of them did not exclude the use of ordinary means; and partly to go to God for relief and redress.
Related Commentaries of Numbers 20:6
Numbers 20:6
6 And Moses and Aaron went from the presence of the assembly unto the door of the tabernacle of the congregation, and they fell upon their faces: and the glory of the LORD appeared unto them.