Midrasz do Królów II 25:19

Rabbi Yoḥanan interpreted the verse regarding the Sanhedrin. “Behold the bed [mitato],” his tribes [matotav] and his clans, just as you say: “The oaths to the tribes [matot]” (Habakkuk 3:9); “of Solomon [Shlomo],” of the king [of Whom it may be said] that peace [shalom] is His; “sixty valiant men,” these are the sixty people from the people of the land; that is what is written: “And sixty men of the people of the land who were found in the city” (II Kings 25:19); “from the valiant of Israel,” these are the eleven men; that is what is written: “The captain of the guards took Seraya the chief priest, Tzefanyahu the deputy priest, and the three gatekeepers. From the city he took one official [saris] (II Kings 25:18–19),” this is the most distinguished member of the court. Why is he called saris? It is because he reorders and resolves [mesares] the halakha; “and five men of those who see the king's face (II Kings 25:19),” this is eleven. When it says “seven [men of those who see the king’s face]” (Jeremiah 52:25), that is to add two scribes of the judges who sit before them. “From the valiant of Israel,” as they benefit Israel with their might.
“Each armed with a sword,” Rabbi Meir and Rabbi Yosei, Rabbi Meir says: They would all study halakha like a sword, so if an incident comes before them, the halakha would not be dull for them.⁸⁸They studied intensely, so that they would be sharp and clear in their halakhic rulings and analyses. Rabbi Yosei says: During a trial, all of them deliberate how best to issue a verdict regarding the incident, and they fear the judgment of Gehenna.
Rabbi Menaḥem son-in-law of Rabbi Elazar bar Avuna [said] in the name of Rabbi Yaakov bar Avina: If a woman comes before you to the study hall to ask you a question regarding her stain or her menstruation, look upon her as though she emerged from your loins and do not look at her covetously; fear the judgment of Gehenna.