Negligence

Quote from Letter 5,4 to Victor, bishop op Palermo. September 594.

No reason at all allowed the bearer of this Letter, Gregory, once abbot and priest of the monastery of Saint Theodore, to have the right to be in charge of the place any longer, following the almost total lapse by that community.
For one who has led so many disciples to Hell through his negligence ought not to be put in charge of those left at any time. But because here in Rome there is a long period of penitential suffering, it is necessary for your Fraternity to receive him in the aforesaid monastery and to appoint him to his position, but in such a way that Urbicus, put in charge of my monastery, ought to provide someone from the servants of God to become his supervisor, so that what is neglected by the lack of care by that man, may be preserved through the concern of this appointee.

Cited from: The Letters of Gregory the Great, trans. John R.C. Martyn (Toronto: PIMS, 2004), II: 325

Decree On Holy Orders

Letter 4,11 - to Maximian, bishop of Syracuse. September 593

" You should not allow priests, deacons and other clerics, who serve the churches, to become abbots in the monasteries. Rather, they should either give up their clerical service and be called to monastic orders, or if they have decided to remain in the role of abbot, they should in no way be permitted to continue in the service of a cleric.
For it is quite improper if someone cannot fulfill just one of these roles diligently, in proportion to its importance, and yet is judged suitable for both of them.
Thus the ecclesiastical order would impede the monastic life, and in turn the rule of monasticism would also impede the ecclesiastical benefits."

Cited from: The Letters of Gregory the Great, trans. John R.C. Martyn (Toronto: PIMS, 2004), I: 295

The Abbot Of Saint Martin's

Letter 3,23 - to Peter, sub-deacon of Campania. March 593

"We therefore order your Experience with the the power of this authority to remove the above-mentioned Secundinus from the office of abbot, and to see that Theodosius, whose community has itself asked for him to be ordained, is appointed abbot in the monastery of Saint Martin, with due solemnity, through him whom it concerns.
Thus in caring for a community subject to him, with the help of God, he may be vigilant with provident concern. But defend the possessions and gardens of this same monastery with Church protection, as fat as is reasonably allowed."

Cited from: The Letters of Gregory the Great, trans. John R.C. Martyn (Toronto: PIMS, 2004), I: 251.