Nor shall leaven be seen among you in all your quarters. 

The fear of the Lord is to hate evil. § Abhor what is evil. § Abstain from every form of evil. § [Look] carefully lest anyone fall short of the grace of God; lest any root of bitterness springing up cause trouble, and by this many become defiled.If I regard iniquity in my heart, the Lord will not hear.Do you not know that a little leaven leavens the whole lump? Therefore purge out the old leaven, that you may be a new lump, since you truly are unleavened. For indeed Christ, our Passover, was sacrificed for us. Therefore let us keep the feast, not with old leaven, nor with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth. § Let a man examine himself, and so let him eat of the bread and drink of the cup.Let everyone who names the name of Christ depart from iniquity. § Such a High Priest was fitting for us, who is holy, harmless, undefiled, separate from sinners. § In Him there is no sin.