Reference for Zevachim 232:1

דאפילו אקשויי נמי לא אקשו ומנא ידעה דאמר מר אין לך כל שר ונגיד שלא בא על רחב הזונה

- [She meant that] they even lost their virility. And how did she know this? - Because, as a master said, There was no prince or ruler who had not possessed Rahab the harlot.

Jastrow

Jastrow