1 Samuel 21:4-6

4And the priest answered David, "I have no common bread on hand, but there is holy bread—if the young men have kept themselves from women."

5And David answered the priest, "Truly women have been kept from us as always when I go on an expedition. The vessels of the young men are holy even when it is an ordinary journey. How much more today will their vessels be holy?"

6So the priest gave him the holy bread, for there was no bread there but the bread of the Presence, which is removed from before the Lord, to be replaced by hot bread on the day it is taken away.