'Purity' in the Bible

Kiss (pay respect to) the Son, so that He does not become angry, and you perish in the way,For His wrath may soon be kindled and set aflame.How blessed [fortunate, prosperous, and favored by God] are all those who take refuge in Him!

Such purity characterizes the people who seek his favor, Jacob's descendants, who pray to him. (Selah)