earth opened: Num 16:2, Num 16:31-35, Num 16:38, Num 27:3, Exo 16:35, Psa 106:17, Psa 106:18
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 - Psa 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: Num 16:38, 1Sa 2:34, Jer 29:22, Eze 14:8, 1Co 10:6-10, 2Pe 2:6, Jud 1:7
Reciprocal: Exo 6:21 - Korah Num 16:1 - Korah Num 16:35 - And there Deu 11:6 - he did unto 2Sa 20:19 - swallow 1Ch 6:37 - Korah Pro 1:12 - whole