1 Samuel 21:6

And David answered the priest, and said to him, Yea, we have been kept from women for three days: when I came forth for the journey all the young men were purified; but this expedition is unclean, wherefore it shall be sanctified this day because of my weapons.

So Abimelech the priest gave him the show bread; for there were no loaves there, but only the presence loaves which had been removed from the presence of the Lord, in order that hot bread should be set on, on the day on which he took them.

So the priest gave him hallowed bread: for there was no bread there but the shewbread, that was taken from before the Lord, to put hot bread in the day when it was taken away.