(Devarim 1:16) "And I charged your judges at that time, saying": In the past, you were independent; now you are obligated to the congregation.
It once happened that R. Gamliel placed R. Yochanan b. Nuri and R. Elazar b. Chasma at the head of the academy, and the disciples were unaware of their absence. Towards evening, they returned and sat with the disciples. Such was the trait of R. Gamliel: When he entered (the house of study) and said "Ask" (what is on your minds), it was known that there were no provocateurs there. When he entered and did not say "Ask," it was known that there were provocateurs there. When he entered and found R. Yochanan b. Nuri and R. Elazar b. Chasma sitting among the disciples, he said to them: (By your behavior) you have made it known to the congregation that you do not wish to exercise authority over them — In the past, you were independent; from now on, you are obligated to the congregation (for their good and welfare). (Ibid.) "Hear among your brothers": He told them: Be deliberate in judgment. If a (similar) case comes before you one, two, or three times, do not say: I've already ruled on this several times, but be deliberate in (the) judgment (of each case). And thus did the men of the Great Assembly say. "Be deliberate in judgment, and set up many disciples, and make a fence for the Torah."