Numbers 25:9
"And those that died in the plague were twenty and four thousand."
Cross References (ranked by relevance)
1 Corinthians 10:8
11
Neither let us commit fornication, as some of them committed, and fell in one day three and twenty thousand.
Numbers 31:16
Behold, these caused the children of Israel, through the counsel of Balaam, to commit trespass against the LORD in the matter of Peor, and there was a plague among the congregation of the LORD.
Numbers 14:37
Even those men that did bring up the evil report upon the land, died by the plague before the LORD.