LXX Num 26:10

καὶ ἀνοίξασα ἡ γῆ τὸ στόμα αὐτῆς κατέπιεν αὐτοὺς καὶ κόρε ἐν τῇ συναγωγῇ αὐτοῦ, ὅτε κατέφαγεν τὸ πῦρ τοὺς πεντήκοντα καὶ διακοσίους, καὶ ἐγενήθησαν ἐν σημείῳ.

And the earth opened its mouth and swallowed them along with Korah, whose followers died when the fire consumed 250 men. They serve as a warning sign.