A cloud appeared over the screen and fire illuminated the night. Rabbi Meir says that there were two clouds, as it says, "For the cloud of the Lord was upon the tabernacle by day." Rabbi Elazar ben Shamu'a says that there was one cloud, as it says, "A cloud appeared over the screen and fire illuminated the night." Hezekiah said that it changed for them because of the impure and diseased, so they would know when it was day and when it was night. The rock opened, and water gushed forth. Rabbi Chama bar Chanina said that at first, it brought forth blood, and the mockers of the generation said, "Now we will put our mouths to it and drink the blood." Afterward, it brought forth water and washed them, as it says, "Streams flooded forth."