earth opened: Numbers 16:2, Numbers 16:31-35, Numbers 16:38, Numbers 27:3; Exodus 16:35; Psalms 106:17-18
together: The Samaritan text does not intimate that Korah was swallowed up, but that he was burnt, as appears to have been the fact; and the Psalmist also (Psalms 106:17), only mentions Dathan and Abiram as having been swallowed up. "And the earth swallowed them up, what time that company died; and the fire devoured Korah with the 250 men, who became a sign."
they became a sign: Numbers 16:38; 1 Samuel 2:34; Jeremiah 29:22; Ezekiel 14:8; 1 Corinthians 10:6-10; 2 Peter 2:6; Jude 1:7