The interpretation timeline
Genesis 44:12 Douay-Rheims

Which when he had searched, beginning at the eldest and ending at the youngest, he found the cup in Benjamin’s sack.

1105 – 1771 2 witnesses

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
בגדול החל AT THE ELDEST HE BEGAN — so that they should not perceive that he knew where it was (Genesis Rabbah 92.8).”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And he searched,.... To the bottom of them, not content to look into the mouth of them being opened, but rummaged them, and searched deeply into them to find the cup, which was the thing charged upon them he was solicitous to find; as for the money in the sack's mouth he took no notice of that, nor is there any mention of it: and began at the oldest; at Reuben, as the Targum of Jonathan expresses it: the steward might know their different ages in course, by the order in which they were placed at Joseph's table when they dined with him: and left off at the youngest; at Benjamin, he ended his scrutiny with him; this method he took partly to hold them in fear as long as he could, and partly to prevent any suspicion of design, which might have been entertained had he went directly to Benjamin's sack: and the cup was found in Benjamin's sack; where the steward himself had put it, and as it is usually said, they that hide can find.”
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.