# As Yahweh of hosts lives, before whom I stand, if I ... look at you

"As surely as Yahweh of hosts lives, before whom I serve, I promise you, if I ... look at you" 

# if I did not honor the presence of Jehoshaphat king of Judah, I would not pay any attention to you

"it is only because I honor the presence of Jehoshaphat king of Judah that I pay attention to you" 

# I would not pay any attention to you, or even look at you

"I would not have anything at all to do with you"