Gevurot Meyruach Hakodesh 23:11-24

And on the following lailah, HaAdon stood by Rav Sha'ul and said, Chazak! For as you gave solemn edut about me in Yerushalayim, thus it is necessary for you also to bear solemn eidus in Rome. In the boker, the Judeans joined in a kesher and bound themselves with a shevu'ah that none of them would eat or drink until they had carried out their plot of retzichah b'seter of Rav Sha'ul. Now there were more than arba'im anashim (forty men) who joined in this kesher. After they approached the Rashei HaKohanim (Chief Priests) and the Zekenim (Elders), they said, We have bound ourselves with a shevu'ah (oath) to eat nothing until we have killed Rav Sha'ul. Now, therefore, you with the Sanhedrin notify the tribune so that he may bring Rav Sha'ul down to you as if intending to determine more accurately the things concerning him, and, before he draws near, we are ready to kill him. Now when Rav Sha'ulʼs achyon (nephew) heard about the ma'arav (ambush), he went and gained entrance into the barracks and reported this to Rav Sha'ul. And Rav Sha'ul summoned one of the centurions and said, Bring this bochur to the tribune for he has something to report to him. So the centurion took the bochur and brought him to the tribune and says, The prisoner Rav Sha'ul has summoned me and asked me to bring this bochur to you; he has something to say to you. The tribune grasped the bochurʼs hand and drew him aside privately, inquiring, What is it you have to report to me? And the bochur said, The Judeans agreed to ask you to bring Rav Sha'ul down machar (tomorrow) to the Sanhedrin as if intending to inquire something more accurate concerning him. Therefore, you should not be persuaded by them, for more than arba'im anashim are lying in wait for him and these took a shevu'ah upon themselves neither to eat nor to drink until they have assassinated him, and now they are ready, waiting for your consent. Therefore, the tribune dismissed the bochur, ordering him, Tell no one that you reported these things to me. And having summoned two of the centurions, the tribune said, Prepare to leave for Caesarea by nine o'clock tonight the following: two hundred chaiyalim, seventy horsemen, and two hundred bowmen. And also provide mounts for Rav Sha'ul to ride, that he may be given safe passage to Felix the Moshel.