Dhammapada 241-243

The taint of prayers is non-repetition; the taint of houses, non-repair; the taint of the body is sloth; the taint of a watchman, thoughtlessness. 

Bad conduct is the taint of woman, greediness the taint of a benefactor; tainted are all evil ways in this world and in the next. 

But there is a taint worse than all taints—ignorance is the greatest taint. O mendicants! throw off that taint, and become taintless!