Numbers 25:7

וירא פנחס AND PHINEAS SAW — He saw what was being done and he was thereby reminded of the law on this subject (Sanhedrin 82a). He said to Moses, “I have received a tradition from you: he who has intercourse with an Aramean (heathen) woman, zealous people may attack him”. He replied to him: “Let him who reads the letter be the agent for executing it”; — straightway, ויקח רמח בידו HE TOOK A JAVELIN IN HIS HAND, etc. (Sanhedrin 82a).

וַיַּ֗רְא פִּֽינְחָס֙ בֶּן־אֶלְעָזָ֔ר בֶּֽן־אַהֲרֹ֖ן הַכֹּהֵ֑ן וַיָּ֙קׇם֙ מִתּ֣וֹךְ הָֽעֵדָ֔ה וַיִּקַּ֥ח רֹ֖מַח בְּיָדֽוֹ׃

And when Pineĥas, the son of El῾azar, the son of Aharon the priest, saw it, he rose up from among the congregation, and took a spear in his hand;