'Lions' in the Bible

Who through faith overcame kingdoms, did righteousness, got their reward, kept the mouths of lions shut,

And they had hair like the hair of women, and their teeth were as the teeth of lions.

And so I saw the horses in the vision, and those who were seated on them, having breastplates of fire and glass and of burning stone: and the heads of the horses were as the heads of lions; and out of their mouths came fire and smoke and a smell of burning.