What is the meaning of "[Kesem] Al Sifsei Melech"?
Rashi: It is on the lips of a Chacham sitting in judgment.
R. Yonah: It is as if there is Nevu'ah on a king's lips to recognize the litigants, which claims Emes and which Sheker.
Malbim: Lips represent external speech; the mouth is internal speech, with Chachmah. Whatever a king says with his lips, even though it is chance, it is like magic that his words will be fulfilled.
Why does it say "b'Mishpat Lo Yim'al Piv"?
R. Yonah: He will not give a verdict based on a ruse. Sometimes the one who claims does not have witnesses, and the judges improperly exempt the defendant. However, a king who desires the true judgment does not normally stumble in this. Due to fear of him, the defendant fears to lie. If he lied, [people] will investigate and the matter will be found, for many love the king - "Gam b'Mada'acha Melech Al Tekalel
The one who saw Avshalom hanging by his hair said so. What is R. Yonah's source that it was Achima'atz? (PF)
We find that David did not recognize that Mefivoshes' slave lied (Shmuel II, 9:30)! Perhaps there was different, for David believed the Leshon ha'Ra that Mefivoshes hoped to become king, so David was like Noge'a b'Davar (biased). A sign of Mashi'ach is that he can judge without witnesses (Sanhedrin 93b). According to R. Yonah, the same applies to any king! (PF)
