The Rule of St. Benedict

Let the brethren who are to be sent on a journey recommend themselves to the prayers of all the brotherhood and of the Abbot. And after the last prayer at the Work of God, let a commemoration always be made for the absent brethren.

On the day that the brethren return from the journey, let them lie prostrate on the floor of the oratory at all the Canonical Hours, when the Work of God is finished, and ask the prayers of all on account of failings, for fear that the sight of evil or the sound of frivolous speech should have surprised them on the way.

And let no one presume to relate to another what he hath seen or heard outside of the monastery, because it is most hurtful. But if anyone presume to do so, let him undergo the penalty of the Rule. In like manner let him be punished who shall presume to go beyond the enclosure of the monastery, or anywhere else, or to do anything, however little, without the order of the Abbot.