1 Samuel 21:6-7

6“Of course women have been kept from us, as on previous campaigns,” David answered the kohen. “So the young men’s vessels were holy, though it was an ordinary mission—how much more so will their vessels be holy today!”

7So the kohen gave him consecrated bread, for there was no bread there but the bread of the Presence, which was taken out from the presence of Adonai in order to replace it with hot bread on the day it was taken away.