Job 1:17 (ESV)

17 While he was yet speaking, there came another and said, “The Chaldeans formed three groups and made a raid on the camels and took them and struck down the servants with the edge of the sword, and I alone have escaped to tell you.”

In all four cases, the messenger was the only person to survive disaster. This shows the completeness of Satan’s onslaught and Job’s losses.