God stopped killing people for "committing whoredom with the daughters of Moab" because "his wrath was turned away" by a man who thrust a javelin through a man of Israel and a daughter of Moab (through her belly). What was the man's name?

Phinehas

And he went after the man of Israel into the tent, 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 25:7-8