Midrasz do Berachot 3:8

The fourth wonder (was): From the day when the heavens and the earth were created no man was ill, (who) sneezed and lived, but in every place where he happened to be, whether on the way or in the market, and (when he) sneezed, his soul went out through his nostrils; until our father Jacob came and prayed for mercy concerning this, and he said before the Holy One, blessed be He: Sovereign of all the worlds! Do not take my soul from me until I have charged my sons and my household; and He was entreated of him, as it is said, "And it came to pass after these things, that one said to Joseph, Behold, thy father is sick" (Gen. 48:1). || All the kings of the earth heard (thereof), and they wondered because there had been no one like him from the days when the heavens and earth had been created. Therefore a man is in duty bound to say to his fellow: Life! when the latter sneezes, for the death of the world was changed into light, as it is said, "His neesings flash forth light" (Job 41:18).