NET
8 So then, let us celebrate the festival, not with the old yeast, the yeast of vice and evil, but with the bread without yeast, the bread of sincerity and truth.
Darby
8 so that let us celebrate the feast, not with old leaven, nor with leaven of malice and wickedness, but with unleavened [bread] of sincerity and truth.
KJV
8 Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened [bread] of sincerity and truth.