1 Samuel 21:3-5

3Do you have anything to eat here? Give me five loaves of bread or anything else that you have.’

4The priest answered David, ‘I do not have any ordinary bread that I can give to you. There is only the special holy bread. You can take it for your men to eat only if they have not had sex with women.’

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.’