And the man's wife spread a covering (הַמָּסָךְ, the covering which she had close at hand) over the well (over the opening into the cistern), and scattered groats (רִיפֹות, peeled barley: Pro 27:22) upon it, so that nothing was noticed. The Vulgate explanation is a very good one: “quasi siccans ptisanas” (as if drying peeled barley).