The distinction between God's eternal foreknowledge and the eternal election of His children to eternal salvation...

First, the distinction between God's eternal foreknowledge and the eternal election of His children to eternal salvation is to be made carefully.  Foreknowledge or prevision means that God sees and knows everything before it happens.  This is called God's foreknowledge, which extends over all creatures, good and bad.  In other words, He foresees and foreknows everything that is or will be, that is happening or will happen, whether it is good or bad.  For all things, whether they are past or future, are clear and present before God.  This is written in Matthew 10:29:

Are not two sparrows sold for a penny?  And not one of them will fall to the ground apart from your Father.

You eyes saw my unformed substance; in Your book were written, every one of them, the days that were formed for me, when as yet there were none of them. (Psalm 139:16)

I know your sitting down and your going out and coming in, and your raging against Me. (Isaiah 37:28)

God's eternal election, or predestination, means God's preordaining to salvation. It does not include both the godly and the wicked, but only God's children, who were elected and ordained to eternal life before the world's foundation was laid.  As Paul says in Ephesians 1:4-5, "He chose us in Him ... He predestined us for adoption through Jesus Christ."
~BOC, FSD, XI, 4-5