This speaks about sleep as if it were a deep hole into which a person could fall. Alternate translation: "who slept soundly" or "who became more and more tired until finally he was sleeping soundly" (See: [[rc://en/ta/man/translate/figs-metaphor]])
When they went down to check his condition, they saw he was dead. This can be stated in active form. Alternate translation: "third story; and when they went to pick him up, they found that he was dead" (See: [[rc://en/ta/man/translate/figs-activepassive]])