1 Samuel 21:5-6

5David replied, ‘We have not been near women since we left our homes. The young men always keep themselves clean, even on ordinary journeys. So for today's important journey, they will certainly be clean.’

6So the priest gave the holy bread to David because he did not have any other bread. This was the bread which had been on the table in the Lord's tent. The priest would take it from there each day and he would put hot, fresh bread in its place.