Another symbol of baptism in the Old Testament is found in (Ezek.16: 8,9) where the Lord says to the sinful Jerusalem which here resembles the human soul in its fall: "'When I passed by you again and looked upon you, indeed your time was the time of love. I entered into a covenant with you, and you became Mine,' says the Lord God. 'Then I washed you in water; yes, I thoroughly washed off your blood, and I anointed you with oil.' "
This water and this washing are symbols of baptism and the ointment is a symbol of the anointing of the Holy Spirit. The phrase "you became Mine" means that Jerusalem (the human soul) became a member of Christ's Body (the Church).