Мидраш к Шмуэль А 12:3

And thus do you find with Joshua, that he rebuked Israel only close to his death, as it is written (Joshua 24:15) (Joshua said) "If it is evil in your eyes to serve the L-rd, choose this day whom you will serve — the gods that your forefathers served or the gods of the Emorites in whose land you dwell — and I and my house will serve the L-rd." And thus do you find with Samuel, that he rebuked Israel only close to his death, as it is written (I Samuel 12:3) "Here I am (before my death); testify before me in the presence of the L-rd and in the presence of His anointed … (4) and they said: You have not robbed us, etc. (5) and he said: The L-rd is witness unto you this day. And they said: Witness!"

Judges and officials (Deuteronomy 16:18): The judges need to be men of strength through good deeds. As this is what Moshe did: "And Moshe chose men of valor" (Exodus 18:25), in Torah, in good deeds and in courage. And they need to be clean of any infraction, such that there not be a claim (literally, opening of the mouth) for a person against them. [This is] as with Moshe, who said to Israel (Numbers 16:15), "I have not raised up a donkey from one of them"; and Shmuel, who said (I Samuel 12:3), "Here I am, testify against me in the presence of the Lord and in the presence of His anointed one; whose ox have I taken, or whose donkey have I taken, etc." I would thus say, "Judges and officials [appoint for yourself]," that there should not be any matter of disqualification in them. There was a case with Rabbi Chanina ben Elazar who had an inclining tree on his field, such that the branches were inclined over the field of someone else. A man came in front of him and complained and said, "The tree of x is inclined over my field." He said to him, "Go, and come back tomorrow." He said to him, "All the cases that come before you, you judge immediately. But my case you are delaying?" What did Rabbi Chanina do? He immediately sent workers to cut his tree that was in his field, but the branches were inclined over the field of someone else. The next day, that [plaintiff from the previous day] came for judgement. [Rabbi Chanina] said to his opponent, "You need to cut it." He [answered] him, "So why are the branches of your tree inclining over the field of someone else?" He said to him, "Go and see. The same way you see mine, so do to yours." He immediately went and did so. Hence it is written, "Judges and officials," that there should not be a matter of disqualification in the judge.

R. Elazar said: "At three places the Holy spirit appeared: At the court of Shem, in the court of the prophet Samuel, and in the court of King Solomon. At the court of Shem, as it is written (Gen. 38, 26) And Juda acknowledged them and said, She hath been more righteous than I. And whence did he know? Perhaps just as he was with her, so was some one else. Therefore a Heavenly voice was heard: I have decided that so is it to be. In the court of Samuel, as it is written (I. Sam. 12, 5) And he answered, He is witness. Why He? It ought to be they! Hence a Heavenly voice was heard, I witness that so it is. And in the court of King Solomon, as it is written (I. Kin. 3, 17) The king then answered and said, Give her the living child and do not slay it; She is its mother. And whence do we know that it really was so, perhaps she deceived him? Hence the last words, she is its mother, were said by a Heavenly voice." Said Raba: "If it were based merely upon the Scripture, all of them could be objected to, but this is shown by tradition."