'Separated' in the Bible

'Before I form thee in the belly, I have known thee; and before thou comest forth from the womb I have separated thee, a prophet to nations I have made thee.'

The bellows blow,blasting the lead with fire.The refining is completely in vain;the evil ones are not separated out.

And I have separated for thee destroyers, Each with his weapons, And they have cut down the choice of thy cedars, And have cast them on the fire.

The men who have violated My covenant, who have not kept the terms of the solemn pledge which they made before Me when they split the [sacrificial] calf in half, and then afterwards walked between its separated pieces [sealing their pledge to Me by placing a curse on themselves should they violate the covenant—those men I will make like the calf]!