Талмуд к Бамидбар 27:20

Joshua received from Moses – as it says (Numbers 27:20), "Give him some of your majesty, so that the whole congregation of the children of Israel will heed him." The Elders received from Joshua – as it says (Judges 2:7), "The people served the Eternal all the days of Joshua and all the days of the Elders who lived on after Joshua and who had seen all the great works that the Eternal had performed for Israel." The Judges received from Joshua – as it says (Ruth 1:1), "And it was in the days that the Judges judged." The [early] Prophets received it from the Judges – as it says (Jeremiah 7:25), "And I sent you all My servants, the prophets, daily and persistently." Haggai, Zechariah, and Malachi received from the Prophets. The Men of the Great Assembly received from Haggai, Zechariah, and Malachi. And they said three things: Be deliberate in judgment, and raise up many students, and make a fence around the Torah.