Sanhedrin 82B

נשען והולך על מקלו, וכיון שהגיע אצל שבטו של שמעון אמר: היכן מצינו ששבטו של לוי גדול משל שמעון? אמרו: הניחו לו, אף הוא לעשות צרכיו נכנס. התירו פרושין את הדבר.

walking, leaning on his walking stick, the shaft of the spear. And once he reached the tribe of Shimon he said: Where did we find that the tribe of Levi is greater than that of Shimon? If all the members of your tribe submit to the temptation of the women of Moab, I may do so as well. After hearing that statement, the members of the tribe of Shimon said: Allow him to enter; like us, he too is entering to attend to his needs and have sex with the Moabite women. They rejoiced and said: Apparently, the pious and God-fearing have permitted this matter, as Pinehas is one of them.

אמר רבי יוחנן: ששה נסים נעשו לו לפנחס. אחד, שהיה לו לזמרי לפרוש ולא פירש. ואחד, שהיה לו לדבר ולא דבר. ואחד, שכוון בזכרותו של איש ובנקבותה של אשה. ואחד, שלא נשמטו מן הרומח. ואחד, שבא מלאך והגביה את המשקוף. ואחד, שבא מלאך והשחית בעם.

R' Yoḥanan says: 6 miracles were performed for Pinehas when he killed Zimri. One is that Zimri should have separated himself from Cozbi, and he did not separate himself. Had he done so, it would have been prohibited for Pinehas to kill him. And one is that Zimri should have spoken and alerted the members of his tribe to come to his assistance, and he did not speak. And one is that Pinehas directed the spear precisely to the male genitals of Zimri and to the female genitals of Cozbi so that the reason that he killed them would be evident. And one is that Zimri and Cozbi did not fall from the spear. And one is that an angel came and raised the lintel of that chamber so that Pinehas could emerge holding them aloft on the spear. And one is that an angel came and caused destruction among the people, distracting them from interfering with the actions of Pinehas.