Catholic prayer to protect your marriage from the devil

In many ways marriage is the "devil's playground," as he is intent on destroying humanity and he can be most effective if he attacks a couple. This is why prayer in a marriage is so important, as it can protect a couple from the assaults of evil spirits.

Here is an excerpt of a prayer from The Catholic Marriage Manual published in the 1950s that invokes the angels and saints, asking them for protection from the devil.