What is "Fi Rasha u'Fi Mirmah"?
Rashi: Fi Rasha is Esav.
Radak: Pi Mirmah is Pi Ish Mirmah.
Malbim: On the one side, they opened their mouths with evil, to kill me without reason. On [the other] side they opened their mouths with deceit, for they spoke Sheker with me.
Why does it say "Alai Pasachu"?
Radak (31, from Shocher Tov): They opened and entered the Kodesh ha'Kodoshim, and said "Ei Elokeimo Tzur Chasayu Vo", "Yakumu v'Ya'azruchem", "Yadeinu Ramah v'Lo Hashem Pa'al Kol Zos" (Devarim 32:37-38, 27).
Why does it say "Dibru Iti"?
Radak: They spoke when I see them.
Malbim: When they spoke with me, it was Leshon Sheker - as if they love me.
What is "Leshon Sheker"?
Radak: They show themselves to love me, and their mouths and tongues are deceit and Sheker.