From the Council of Paris, about A.D. 557

Canon IV. Let no one presume to draw illicit marriages contrary to the commandment of the Lord, that is, let him not dare to associate to himself the widow of his brother, nor his own stepmother, nor the widow of his paternal uncle, nor the sister of his wife; nor let him possess himself of the marriage of his daughter-in-law or maternal aunt. Under like condition we command that one abstain from unions with an aunt, a stepdaughter, and the daughter of a stepdaughter.

Canon V. Let no one obtain the marriages even of sacred virgins either by abduction or by any competitions (competition signifies a certain force, but rather moral, under the appearance of right or by abuse of authority). Similarly, one must abstain from unions with those women who, by change of garment, whether widows or girls, have professed religion, penance, or virginity by public declaration. But if anyone has come against the interdiction and has neglected to hear his priest, let him in the present be held a stranger from the communion of the Catholic Church and be struck with anathema forever.

Cf. Canon XIX of the Council of Orleans just cited.

Canon VI. Let no one presume to abduct a widow or the daughter of another outside the will of the parents, or judge that she is to be sought by the king's favor. But if he has done this, similarly removed from the communion of the Church, let him be punished with the condemnation of anathema.

Cf. Canon XXII of the Council of Orleans, above, A.D. 541.