'Mountaintops' in the Bible

And the men of Shechem put men in ambush against him on the mountain tops, and they robbed all who passed by them along that way; and it was told Abim'elech.

And when Ga'al saw the men, he said to Zebul, "Look, men are coming down from the mountain tops!" And Zebul said to him, "You see the shadow of the mountains as if they were men."