From the Statutes of St. Boniface, (From the Spicilegium Dacherianum, Tom. IX) after A.D. 751

Statute XXXV. Let each of the presbyters publicly admonish the people to abstain from illicit marriages, and that, according to the command of God, legitimate marriage can by no means be separated on any occasion, except for the cause of fornication, unless with the consent of both, and this on account of the service of God.

The discourse is not about dissolution of the bond, but about separation of the spouses, which, when fornication intervenes, can be done by the innocent party, the other unwilling; but this case being set aside, it is said that it cannot be done except by the consent of both, and indeed on account of the service of God, for example that the man may receive orders, or that both may profess chastity. The mention of this final cause placed in the service of God sufficiently shows that Boniface had before his eyes only separation of spouses, not dissolution of the bond by which power for other nuptials is made.