Foods That Defile: How can foods that defiled you in Leviticus (Old Testament) no longer defile you in the New Testament? [Leviticus 11:43, Mark 7:15]. Unclean Foods: Were the unclean foods the ones that might be more likely unsanitary or prone to bacteria? [Acts 10:15, 2 Corinthians 6:14, Matthew 15:11].