WHERE DID OUT SOULS COME FROM

How do I prove that our souls existed even before we were conceived?

Jeremiah 1:1-5
1:1 The words of Jeremiah the son of Hilkiah, of the priests that were in Anathoth in the land of Benjamin:
1:2 To whom the word of the LORD came in the days of Josiah the son of Amon king of Judah, in the thirteenth year of his reign.
1:3 It came also in the days of Jehoiakim the son of Josiah king of Judah, unto the end of the eleventh year of Zedekiah the son of Josiah king of Judah, unto the carrying away of Jerusalem captive in the fifth month.
1:4 Then the word of the LORD came unto me, saying,
1:5 Before I formed thee in the belly I knew thee; and before thou camest forth out of the womb I sanctified thee, and I ordained thee a prophet unto the nations.

Ecclesiastes 12:6-7
12:6 Or ever the silver cord be loosed, or the golden bowl be broken, or the pitcher be broken at the fountain, or the wheel broken at the cistern.
12:7 Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it.

Ephesians 1:4-5
1:4 According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:
1:5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
1:5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,