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Phinehas ... took a javelin ... and thrust both of them through, the man of Israel, and the woman through her belly. So the plague was stayed from the children of Israel. Numbers 25:7
Trivia: After God killed Korah, his companions, their families, and 250 incense burners, the people complained saying, "ye have killed the people of the Lord." So God sent a plague on the people. How many people died in the plague?