Gregory the Great, on 1Sam 3:20

“And all Israel from Dan to Bersabee, knew that Samuel was a faithful prophet of the Lord.”

“30. For what is designated by Dan except the simple, and what by Beersheba except the wise? From Dan even to Beersheba Samuel is acknowledged as the faithful prophet of the Lord, when the life of a chosen preacher is set forth to the simple as an example of salvation, and to the wise the mysteries of Holy Scripture are revealed through his teaching. But since Beersheba is interpreted as "the seventh well," by Beersheba can be designated not only the wise, but also the righteous. For what is the seventh well except the grace of the sevenfold Spirit? By Dan the life of sinners is shown, because it is said through the ancient prophet: 'Let Dan be a serpent in the way, an adder in the path, biting the horse's heels, so that his rider shall fall backward' (Gen. 49:17). Therefore from Dan even to Beersheba Samuel is known as the prophet of the Lord, since the life and teaching of a chosen preacher is venerable both to sinners and to the righteous—so that in him, namely, the fallen may see the good by which they may correct themselves through repentance, and the good may marvel at the loftiness of life toward which they may daily grow stronger by advancing. There follows: (Verse 21.) And the Lord continued to appear in Shiloh.”

Imported from an open dataset — not yet checked against the printed edition.