The interpretation timeline

Jdt 1:6

How this passage has been read — the sources, oldest to newest.

From the early Church Fathers to now.

Jdt 1:6 · Douay-Rheims
“In the great plain which is called Ragua, about the Euphrates, and the Tigris, and the Jadason, in the plain of Erioch the king of the Elicians.”
Post-Reformation c. 1650 – 1900
1849
A.D.
1774–1849
“Ragau, near Rages. (Tobias i. 16.) (Menochius) — Syriac, “Dura,” mentioned [in] Daniel iii. 1. (Calmet) — Jadason, or Mount Jason, above the Caspian gates; (Strabo xi.) unless it may be the city Jassu, in Armenia. Greek has “the Hydaspes,” a river of India, though Curtius (v.) places it near Susa; confounding it with the Choaspes. — Elicians. Greek, “Elymeans,” perhaps the same with Pontus. Hebrew Ellasar, Genesis xiv. 9. Various battles were fought during this war, which the Greek intimates lasted seven years. (Calmet) — That version also would represent these and various other nations coming to meet Nabuchodonosor, who hereupon sent his ambassadors to all in Persia, and westward to Cilicia, &c. As they were treated contemptuously, he swore that he would revenge himself. But first he attacked Arphaxad, took and sacked Ninive, slew the king, and then abandoned himself with his army to pleasure in the conquered city, “120 days.” (Haydock)”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.