'Hills' in the Bible

What do you yourselves think? Suppose a man gets a hundred sheep and one of them strays away, will he not leave the ninety-nine on the hills and go and look for the one that is straying?

"then let those who are in Judaea escape to the hills;

And constantly, day and night, he remained among the tombs or on the hills, shrieking, and mangling himself with sharp stones.

"As soon, however, as you see the Abomination of Desolation standing where he ought not" --let the reader observe these words--"then let those in Judaea escape to the hills;

Then let those who shall be in Judaea escape to the hills; let those who are in the city leave it, and those who are in the country not enter in.

Then will they begin to say to the mountains, 'Fall on us;' and to the hills, 'Cover us.'

Here is scope for the exercise of a mind that has wisdom! The seven heads are the seven hills on which the woman sits.