O Lord, visit this place
and drive far from it all the snares of the enemy.
Let your holy angels dwell here
that you may keep us in peace,
and let your blessing be always upon us;
through Jesus Christ our Lord. Amen.
May your divine help always remain with us. Amen.
Source: Slightly modified from Compline, Roman Breviary, found here: https://forums.catholic.com/showthread.php?t=540120
The second short prayer accompanies it in The Irish Handbook of the Holy League, called the Apostleship of Prayer, Dublin, 1890, p. 73