'Sparing' in the Bible

What if there are 50 righteous people in the city? Will You really sweep it away instead of sparing the place for the sake of the 50 righteous people who are in it?

a ruthless nation, showing no respect for the old and not sparing the young.

Like hovering birds,so the Lord of Hosts will protect Jerusalem—by protecting it, He will rescue it,by sparing it, He will deliver it.

I know that after my departure savage wolves will come in among you, not sparing the flock.