Cross reference
Numbers 16:49
49 Now those who died by the plague were fourteen thousand and seven hundred, besides those who died about the matter of Korah.
Numbers 25:9
9 Those who died by the plague were twenty-four thousand.
Numbers 16:32-35
32 and the earth opened its mouth, and swallowed them up, and their households, and all the men who appertained to Korah, and all their goods.
33 So they, and all that appertained to them, went down alive into Sheol: and the earth closed on them, and they perished from among the assembly.
34 All Israel that were round about them fled at the cry of them; for they said, Lest the earth swallow us up.
35 Fire came forth from Yahweh, and devoured the two hundred fifty men who offered the incense.
1 Chronicles 21:14
14 So Yahweh sent a pestilence on Israel; and there fell of Israel seventy thousand men.
Hebrews 2:1-3
1 Therefore we ought to pay greater attention to the things that were heard, lest perhaps we drift away.
2 For if the word spoken through angels proved steadfast, and every transgression and disobedience received a just recompense;
3 how will we escape if we neglect so great a salvation-- which at the first having been spoken through the Lord, was confirmed to us by those who heard;
Hebrews 10:28-29
28 A man who disregards Moses' law dies without compassion on the word of two or three witnesses.
29 How much worse punishment, do you think, will he be judged worthy of, who has trodden under foot the Son of God, and has counted the blood of the covenant with which he was sanctified an unholy thing, and has insulted the Spirit of grace?
Hebrews 12:25
25 See that you don't refuse him who speaks. For if they didn't escape when they refused him who warned on the Earth, how much more will we not escape who turn away from him who warns from heaven,