1)
Why did he say "Kim'at Ya'avor Avdecha"?
1.
Rashi: I will accompany you a little, after you cross the Yarden. Radak - after this, I will return to my city.
2)
Why did he say "Lamah Yigmeleni ha'Melech ha'Gemulah ha'Zos"?
1.
Rashi: It is not good for me.
2.
Malbim: I will accompany you only a little. Do I deserve such reward for this?!
1
1
Did he not understand that the reward was for financing David in Machanayim, and not for accompanying him now?! (PF)