Tafsiran Bilangan 25:8: Rashi, Midrash Lekach Tov, Sforno & Or HaChaim

אל הקבה means TO THE TENT.

And another Israelite came after them to the tent. He was coming and going after Zimri to the tent, and he pierced both the Israelite man and the woman through their stomach. The place of the stab was deliberate. Come and see this one miracle: If those who opposed Pinchas had cried out, they would have killed him. The second miracle is that they did not separate from each other. The third miracle is that in his memory, the man's genitals and the woman's vaginal cavity, which had been seen in the tent, were visible to everyone, and they saw and believed. The fourth miracle is that the spear extended to pierce both of them. The fifth miracle is that Pinchas was given strength in his arm to lift them both. The sixth miracle is that the tree bore the weight. The seventh miracle is that they were not removed from the spear to expose their disgrace to all. The eighth miracle is that the angel turned them upside down, so that the man was above and the woman was below. The ninth miracle is that blood did not drip so that Pinchas the priest would not be defiled. The tenth miracle is that they did not die until they were taken out of the tent, so that Pinchas would not become impure inside the tent. The eleventh miracle is that the angel raised the curtain so that both of them would come out when he carried them on his shoulders. The twelfth miracle is that as soon as they came out, the plague began from Balak's people, so that they would not rise up against Pinchas. He came and beat them before the Lord, and he said before Him, "Master of the Universe, let twenty-four thousand of Israel fall because of these." Immediately, he stood in prayer, as it is stated, "And Pinchas stood and prayed, and the plague was stopped" (Psalm 106:30-31), and it was counted to him as righteousness for generations.

ותעצר המגפה, for G’d had already decreed previously that all the people who had spurned Him would not see the land of Israel. (Numbers 14,25). [this justifies the letter ה before a מגפה which we had not heard about. Ed,]

אל קבתה means IN HER STOMACH, similar to (Deut 18:3): “And the two cheeks and the maw (והקיבה)”. He miraculously struck exactly at Zimri’s male and her female parts so that everyone could plainly perceive that he had not killed them without just cause. Many other miracles, too, were wrought for him, as is related there (Sanhedrin 82b).